Case No.: U Workpapers Supporting 2014 Historic Test Year Page: 1 of 120. Michigan Gas Utilities Corporation

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1 Page: 1 of 120

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3 Page: 3 of 120 Allocation Method G Customer Percent Year Ending Dec. 31, 2014 Date Performed: 4/28/15 14:59 Customer Counts - Total Ln Amount 1 Jan 187,443 2 Feb 172,670 3 Mar 160,494 4 Apr 166,064 5 May 169,458 6 Jun 168,665 7 Jul 168,112 8 Aug 166,692 9 Sep 166, Oct 167, Nov 167, Dec 169, Total 2,030,739 ========= Revenues - Allocation Method S Jurisdiction Percent %

4 1M Allocation Method L Page: 4 of 120 Gas Salaries and Wages Year Ending Dec. 31, 2014 Date Performed: 4/28/15 14:59 Ln 1 Production 740, Transmission 123, Distribution 6,127, Storage 199, Customer Accounts 2,547, Customer Service 618, Sales Salaries & Wages Less A & G(1) 10,357, (1) This salaries and wages total does not include administrative and general. These figures are used for allocation methods in other calculations in this study, not to determine total salaries and wages for the corporation.

5 1M Allocation Methods M & N Page: 5 of 120 Year Ending Dec. 31, 2014 Date Performed: 4/29/15 8:34 Gas Gross Plant - Allocation Method M TRANS- DISTRI- LN ENERGY DEMAND MISSION BUTION STORAGE CUSTOMER TOTAL 1 Plant In Ser 0 2,889,357 49,540, ,639,813 16,769, ,839,245 2 C W I P 0 98,293 2,671,404 3,680, , ,671,957 3 Total 0 2,987,650 52,212, ,319,940 16,991, ,511,202 =========== =========== =========== =========== =========== =========== =========== 4 Percentages =========== =========== =========== =========== =========== =========== =========== Gas Rate Base - Allocation Method N TRANS- DISTRI- LN ENERGY DEMAND MISSION BUTION STORAGE CUSTOMER TOTAL Plus: 5 Working Cap 3,168, ,824 4,722,542 26,631,382 1,898, ,973,138 6 Dir MI Wk Cap Dir WI/FERC WC Dir RETAIL WC Cash/Bank Bal 53, ,022 79, ,746 31, ,225, Fuel Mat & Suppls , , Gas Storage 15,846, ,846, Prepayments ,875 62, ,443 24, , Plant Fut Use Inv in Subs Capt Conserv Cap Con-D Tax Property Tax 0-22, ,315-2,022, , ,556, Payroll Tax 0-4, ,552-1, , Income Tax -107,567-18, , ,127-64, ,255, Cust Advances Othr Prop/Invs 0 375,166 62,817 3,104, , ,643,694 Less: 22 Accum Depr-SL 0 1,206,240 28,330, ,325,597 7,492, ,354, Tot Rate Base 18,960,518 3,302,283 28,260, ,368,281 11,363, ,255,728 =========== =========== =========== =========== =========== =========== =========== 24 Percentages =========== =========== =========== =========== =========== =========== ===========

6 PART I SECTION B Page: 6 of 120 B-3-1 Balance Sheet Assets & Other Debits INVESTOR SUPPLIED FUNDS BALANCE SHEET INVESTOR UTILITY NON- WORKING LN DESCRIPTION SOURCE TOTAL SUPPLIED PLANT UTILITY NET CAPITAL (a) (b) (c) (d) (e) (f) (g) (h) PROPERTY PLANT AND EQUIPMENT 1 Plant In Service WPB6-1c/Dp1 338,839, ,839, ,839, Property Held for Fut Use WPB6-2b/Fp Construction Work in Prog WPB6-3cD1p1 6,671, ,671, ,671, Total Utility Plant 345,511, ,511, ,511,202 0 DEDUCT: Accumulated Depr & Amort 5 Plant In Service WPB6-4c/Ep1 179,354, ,354, ,354,744 0 Accumulated Depr & Amort 6 Held for Future Use Accumulated Depr/Depletion 179,354, ,354, ,354, Net Utility Plant 166,156, ,156, ,156,458 0 ADJUST LIAB ACCTS INCL IN LN 4: 9 Accum Depr related to ARO WPB ,180, ,180, ,180,400 0 in Accounts & NET PLANT--Asset Related Only 182,336, ,336, ,336, Net Plt Acquis. Adj. 114,115 WPB Other Prop & Invests WPB4-1 4,263, , ,608 3,643,695 CURRENT & ACCRUED ASSETS: 13 Utility Plant-ARO WPB4-2 1,253, ,253, Accum Deprec-ARO WPB , , Cash/Bank Bal 131,132,134,135WPB3-3a F7 1,225, ,225, Temporary Cash 136 WPB Notes Receivable 141 WPB Customer A/R 142 WPB4-8 24,008, ,008, Other A/R 143 WPB , , Acc Prov Uncoll Accts 144 WPB4-8 -1,723, ,723, A/R from Assoc Co. 146 WPB4-8 18, , Taxes Rec. Other Co. 147 WPB Prepayments 165 WPB3-4c F6 579, , Accrued Utility Rev 173 WPB4-8 8,786, ,786, Fuel Stk/Gas Stor.151,152,164WPB3-4b F1 15,846, ,846, Oth Mat & Sup 154,156,157,163WPB3-4b F1 683, , Misc and Accrued 174 WPB4-8 4,781, ,819,763 2,819,763 1,961, Derivative Assets 175 WPB , , Int and Div Receivable 171 WPB TOTAL CURRENT & ACCRUED ASSETS 55,910, ,819,763 2,819,763 53,090, Oth Def. Debits Not in RB WPB4-9 97,757,788 40,831, ,890 40,953,972 56,803, Unamort Debt Exp 181 WPB Acc Deferred Tax 190 WPB5-12 9,140,443 9,140, ,140, TOTAL ASSETS & OTHER DEBITS 349,408,412 49,971, ,336,858 3,562, ,870, ,537,768 =========== =========== =========== =========== =========== ===========

7 PART I SECTION B Page: 7 of 120 B-3-2 Balance Sheet Liabilities & Other Credits INVESTOR SUPPLIED FUNDS BALANCE SHEET INVESTOR UTILITY NON- WORKING LN DESCRIPTION SOURCE TOTAL SUPPLIED PLANT UTILITY NET CAPITAL (a) (b) (c) (d) (e) (f) (g) (h) 1 Common Equity 201,207, WPD ,953, ,953, ,953, , , ,RE216 2 Preferred 204 WPB Total Proprietary Capital 146,953, ,953, ,953, Bonds 221 WPB Advances from Assoc 223 WPB5-3 71,000,000 71,000, ,000, Other 224,227,243 WPB TOTAL LONG TERM DEBT: 71,000,000 71,000, ,000, TOTAL CAPITAL 217,953, ,953, ,953,028 0 =========== =========== =========== =========== =========== =========== 9 Accum Prov Inj/Dmgs WPB5-4a DefCr-Sup RetSelSERP WPB5-4 1,570, ,570, Asset Ret. Oblig WPB5-6a 1,703, ,703, Notes Payable 231 WPB Account Payable 232 WPB5-6b 19,455, ,455, Notes Payable 233 WPB5-6c 21,464,583 21,464, ,464, Accts Pyable Other 234 WPB5-6d 2,910, ,910, Customer Deposits 235 WPB5-6e 180, , , Accrued Taxes 236 WPB5-5 3,852, ,852, Accrued Interest 237 WPB5-6f 34, , Dividends Declared 238 WPB5-6e Tax Collect. Pyble 241 WPB5-6h 427, , Misc Cur/Accrued 242 WPB5-6i 2,487, , ,117 2,125, Derivative Liab 244 WPB , , Total Current & Accrued Liabilities 54,309,820 21,464, ,948 22,007,531 32,302, Unamort Debt Disc 226 WPB5-3a Fund Enrich Fac Customer Advances 252 WPB1-6 F Oth Deferred Credit 253 WPB5-9 24,959, , ,699 24,809, Accum DITC 255 WPB , , , Other Regulatory Liab WPB ,889, ,180,400 1,383,093 17,563,493 1,326,211 (Includes and 185) 30 Total Deferred Credits 44,417, ,259 16,180,400 1,383,093 18,281,752 26,136, Accum. Deferred Taxes WPB ,727,605 32,727, ,727, ,281,282, TOTAL LIABILITIES & OTHER CREDITS 131,455,383 54,910,447 16,180,400 1,926,041 73,016,888 58,438, TOTAL EQUITY & LIABILITIES 349,408, ,863,475 16,180,400 1,926, ,969,916 58,438,495 =========== =========== =========== =========== =========== =========== 34 GRAND TOTAL (2) 1-222,891, ,156,458 1,636,220-55,099,272 55,099,273 =========== =========== =========== =========== =========== =========== (1) Gas Study WPB5-7a(F p2) (2) Difference in Non-Utility Grand Total and WPD1-1 are Deferred Taxes, which are included in the capital structure and not on WPD1-1.

8 Page: 8 of 120 WPB6-1c Statement D Page 1 of 1 Gas Plant in Service Produc- Transmis- Distribution sion tion Storage General LN Plant Plant Plant Plant Plant Total 1 Dec 324,475 48,483, ,303,349 16,093,041 24,333, ,538,456 2 Jan 324,475 48,493, ,955,021 16,093,041 24,373, ,238,824 3 Feb 324,475 48,430, ,952,695 16,033,750 24,379, ,121,260 4 Mar 324,475 48,605, ,373,082 16,033,750 24,409, ,746,707 5 Apr 324,475 48,602, ,000,984 16,033,750 24,678, ,639,599 6 May 324,475 48,621, ,626,143 16,033,750 24,733, ,339,249 7 Jun 324,475 48,940, ,487,467 16,033,750 24,740, ,526,674 8 Jul 324,475 48,941, ,501,724 16,064,240 24,875, ,707,454 9 Aug 324,475 48,941, ,527,799 16,064,240 24,924, ,782, Sep 355,128 48,966, ,716,272 16,064,240 24,943, ,045, Oct 360,636 49,847, ,928,902 16,064,240 25,307, ,508, Nov 360,636 51,173, ,607,960 16,156,903 25,443, ,742, Dec 360,636 51,099, ,263,812 16,527,542 25,553, ,804, Av(1) 334,563 49,112, ,496,803 16,082,162 24,812, ,839, Gen 2,554, ,772 21,143, ,164-24,812,740(2) 16 Tot 2,889,357 49,540, ,639,813 16,769,326 =========== =========== =========== =========== 17 Total Corp 338,839,245 =========== (2) Functionalized based on Salaries & Wages: See Allocation Method L. D1

9 Page: 9 of 120 WPB6-3c Statement D-1 Page 1 of 1 Gas Construction Work In Progress Produc- Transmis- Distribution sion tion Storage General LN Plant Plant Plant Plant Plant Total 1 Dec 62,497 2,036,281 2,295,054 83, ,552 5,144,448 2 Jan 28,547 2,058,515 2,050,565 84, ,768 4,905,788 3 Feb 28,547 2,103,567 1,343,623 84, ,831 4,235,129 4 Mar 28,547 2,103,061 1,458,215 98, ,513 4,354,324 5 Apr 28,547 2,349,257 1,738, , ,702 4,623,009 6 May 28,547 2,538,744 2,109, , ,121 5,334,332 7 Jun 28,547 2,937,412 3,128, , ,998 7,149,523 8 Jul 34,055 3,304,515 3,168, , ,206 7,545,824 9 Aug 35,456 3,569,160 3,703, , ,452 8,502, Sep 5,508 3,773,900 4,739, ,587 1,014,661 9,983, Oct 0 3,077,221 4,891, , ,505 9,173, Nov 0 2,059,493 5,100, , ,180 8,383, Dec 0 2,025,682 4,234, , ,836 6,600, Av(1) 23,129 2,658,819 3,058, , ,011 6,671, G & C 75,164 12, ,045 20, ,011(2) 16 Total 98,293 2,671,404 3,680, ,133 ========== ========== ========== ========== 20 Total Corp 6,671,957 ========== (2) Functionalized based on Salaries & Wages: See Allocation Method L. D2

10 Page: 10 of 120 WPB6-4c Statement E Page 1 of 1 Gas Accumulated Depreciation Straight Line Produc- Transmis- Distribution sion tion Storage General Ln Acc Depr Acc Depr Acc Depr Acc Depr Acc Depr Total 1 Dec 252,709 28,082, ,292,183 7,077,430 8,473, ,178,372 2 Jan 252,978 28,130, ,640,049 7,112,389 8,613, ,749,075 3 Feb 253,010 28,093, ,018,408 7,088,214 8,753, ,206,843 4 Mar 253,043 28,193, ,438,399 7,123,285 8,894, ,902,345 5 Apr 253,075 28,216, ,844,637 7,158,356 9,036, ,508,839 6 May 253,108 28,209, ,029,146 7,193,427 9,152, ,838,550 7 Jun 253,140 28,191, ,414,524 7,228,358 9,289, ,377,620 8 Jul 253,173 28,092, ,797,863 7,263,457 9,412, ,819,627 9 Aug 253,205 28,138, ,193,366 7,298,582 9,528, ,412, Sep 253,402 28,190, ,612,498 7,333,708 9,677, ,066, Oct 253,629 28,242, ,923,825 7,368,833 9,820, ,608, Nov 253,862 28,246, ,019,611 7,404,048 9,957, ,881, Dec 254,095 28,134, ,375,323 7,439,934 9,387, ,591, Av(1) 253,252 28,171, ,438,840 7,235,945 9,255, ,354, Gen 952, ,567 7,886, ,326-9,255,638(2) 16 Total 1,206,240 28,330, ,325,597 7,492,271 =========== =========== =========== =========== 17 Total Corp 179,354,744 =========== (2) Functionalized based on Salaries & Wages: See Allocation Method L. E1

11 Page: 11 of 120 WPB3-4b Statement F Page 1 of 8 Gas Materials and Supplies OTHER FUEL STORED LN STOCK DISTRIB AUTO&GEN GAS 1 Dec ,986 14,958,083 2 Jan ,208 11,354,911 3 Feb ,064 9,465,155 4 Mar ,627 5,726,412 5 Apr ,244 6,486,983 6 May ,841 10,017,526 7 Jun ,437 14,953,225 8 Jul ,575 18,857,808 9 Aug ,409 21,065, Sep ,918 25,103, Oct ,889 27,310, Nov ,509 22,581, Dec ,037 19,509, Ave (1) ,519 15,846,427 =========== =========== =========== =========== MATERIALS AND SUPPLIES MGU OTHER FUEL STORED TOTAL STOCK DISTRIB AUTO&GEN GAS 15 Fuel Stock Other 683, , Stored Gas 15,846,427 15,846, Responsibility Factor MGU (2) (3) (3) (4) 19 MGU 16,529, ,519 15,846,427 ========== ========== ========== ========== ========== (2) Demand Responsibility, Allocation Method B. (M-3 P.1) (3) Ratio of Jurisdiction Direct Assigned Distribution - Gross Plant, Allocation Method C. (M-1 P.1) (4) Energy Responsibility, Allocation Method A. (M-2 P.1)

12 Page: 12 of 120 WPB5-7a Statement F Page 2 of 8 Gas Customer Advances (Account 252) Ln Amount 1 Dec 0 2 Jan 0 3 Feb 0 4 Mar 0 5 Apr 0 6 May 0 7 Jun 0 8 Jul 0 9 Aug 0 10 Sep 0 11 Oct 0 12 Nov 0 13 Dec 0 14 Ave(1) 0 ===========

13 Page: 13 of 120 WPB3-2 Statement F Page 3 of 8 Gas Working Capital Allowance LN ASSETS: Electric Gas Non-Util Total Source 1 Utility Plant-ARO ,253, ,253,578 WPB4-2 2 Accum Deprec-ARO , ,367 WPB4-2 3 Special Funds , ,608 WPB4-1 4 Temporary Cash WPB4-7 5 Notes Receivable WPB4-7 6 Customer A/R ,008, ,008,455 WPB4-8 7 Other A/R , ,441 WPB4-8 8 Acc Prov Uncoll Accts ,723, ,723,698 WPB4-8 9 A/R from Assoc Co , ,122 WPB Other Rec. 147/ WPB Accrued Utility Rev ,786, ,786,136 WPB Misc and Accrued ,961,241 2,819,763 4,781,004 WPB Derivative Assets , ,662 WPB Other Deferred Debits 0 56,803,816 40,953,973 97,757,789 WPB Unamort Debt Exp WPB5-3a 16 TOTAL ASSETS 0 91,559,446 44,393, ,952,790 =========== =========== =========== =========== LIABILITIES: 17 Unamort Debt Disc WPB5-3a 18 AccmProv Pnsion/Bnft ,570, ,570,788 WPB Accounts Payable ,703, ,703,939 WPB5-6a 20 Accounts Payable ,455, ,455,011 WPB5-6b 21 Accounts Payable Othr ,910, ,910,539 WPB5-6d 22 Customer Deposits , ,831 WPB5-6e 23 Accrued Interest , ,815 WPB5-6f 24 Dividends Declared WPB5-6g 25 Tax Collections Pyble , ,879 WPB5-6h 26 MiscCur/Accrd Liab ,125, ,117 2,487,291 WPB5-6i 27 Derivative Liab , ,956 WPB Oth Deferred Credits ,809, ,699 24,959,694 WPB Reg. Liabilities ,326,211 1,383,093 2,709,304 WPB TOTAL LIABILITIES 0 54,586,307 2,075,740 56,662,047 =========== =========== =========== =========== 31 WORKING CAPITAL 0 36,973,139 42,317,604 79,290,743 =========== =========== =========== =========== Working Capital is Functionalized based on Rate Base, Allocation Method N. Production Trans- Distri- Cust- Total Energy Demand mission bution Storage omer 32 Work Capital ** 36,973,139 3,168, ,824 4,722,542 26,631,382 1,898, MGU Resp MGU 36,973,139 3,168, ,824 4,722,542 26,631,382 1,898,977 0 ========= ========= ========= ========= ========= ========= ========= ** Working Capital on this page, is included in Working Capital Allowance on SCH B3 (1) Non-Utility includes accounts 129%, 17400M, , 235%, AND

14 Page: 14 of 120 WPB6-2b Statement F Page 4 of 8 Gas Plant Held for Future Use Produc- Trans- Distri- Ln tion mission bution Storage General 1 Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ave (1) =========== =========== =========== =========== =========== PLANT HELD MICHIGAN Production Total Energy Demand Trans. Distrib. Storage 15 Plant Held Resp Factor MGU (2) (2) (2) (2) (2) 17 MGU =========== =========== =========== =========== =========== =========== (2) Direct Assignment to Jurisdiction.

15 Page: 15 of 120 WPB3-4c Statement F Page 5 of 8 Gas Prepayments Taxes Insurance Licenses Surplus Gross Gas Other Lines Tax Rec Tax Cost Ln & Dec 0 287, ,379,202 10, Jan 0 260, , Feb 0 232, , Mar 0 202, , Apr 0 223, May 0 191, Jun 0 160, Jul 0 129, Aug 0 97, Sep 0 66, , Oct 0 35, Nov 0 363, Dec 0 329, ,998, Ave(1) 0 189, ,288 2, =========== =========== =========== =========== =========== =========== =========== Functionalization (2): Production Total Energy Demand Trans. Distrib. Storage 15 Insuran 189, ,489 3, ,285 5, License Taxes 387, ,349 58, ,368 19, SurplsLn 2, , Grs Rcts Gas Csts Total 579, ,875 62, ,443 24,416 =========== =========== =========== =========== =========== =========== (2) Following are the functionalization methods used for each sub-account: Insurance: Salaries and Wages (Allocation L). Licenses: Salaries and Wages (Allocation L). Taxes: Net Plant (Allocation Method M). SurplsLns: Rate Base (Allocation Method N). Gross Rcpt: Gross Plant (Allocation Method M). Gas Costs: Rate Base (Allocation Method N).

16 Page: 16 of 120 WPB3-3a Statement F Page 6 of 8 Gas Cash and Bank Balances Interest Other Special Special Working Ln Cash Deposits Deposits Fund Dec 370, ,927 2,000 2 Jan 753, ,847 2,000 3 Feb 913, ,863 2,000 4 Mar 2,540, , Apr 567, , May 394, , Jun 697, , Jul 210, , Aug 251, , Sep 104, , Oct 273, , Nov 151, , Dec 752, ,212, Ave (1) 618, , =========== =========== =========== =========== Functionalization (2) Production Total Energy Demand Trans. Distrib. Storage 15 Cash 618,426 52,996 9,230 78, ,446 31, Int Dep Oth Dep 606, , Wk Fund Total 1,225,628 53, ,022 79, ,746 31,784 =========== =========== =========== =========== =========== =========== (2) Following are the functionalization methods used for each sub-account: Cash: Rate Base (Allocation N). Interest: Rate Base (Allocation N). Special Deposits: Production - Demand Related. Working Fund: Rate Base (Allocation N).

17 Page: 17 of 120 WPB3-6a Statement F Page 7 of 8 Gas Taxes Property Payroll Income 1 Dec 3,633,032 39, ,350 2 Jan 3,148,586 67,561-1,580,761 3 Feb 3,123,430 60,075 1,772,808 4 Mar 3,124,701 45,203 3,621,267 5 Apr 3,123,619 15,302 3,943,912 6 May 3,123,725 23,069 2,888,425 7 Jun 3,116,901 37,601 2,928,554 8 Jul 2,996,377 48,175 2,000,995 9 Aug 1,266,079 16,907 1,035, Sep 1,262,966 61, Oct 1,263,157 35, , Nov 1,243,124 35, , Dec 4,135,547 40, Avg 2,556,413 40,549 1,255,226 =========== =========== =========== JURISDICTIONAL TAXES (2) Production Total Energy Demand Trans. Distrib. Storage 15 Property 2,556, , ,315 2,022, , Payroll 40, , ,552 1, Income 1,255, ,567 18, , ,127 64, Total 3,852, ,567 45, ,343 2,960, ,312 =========== =========== =========== =========== =========== =========== (2) Functionalized Allocation Basis: Property Tax - M, Net Plant Payroll Tax - L, Salaries & Wages Income Tax - N, Rate Base

18 Page: 18 of 120 WPB1-1c Statement F Page 8 of 8 Other Property and Investments ACCT ACCT NON- LN UTILITY(2) TOTAL 1 Dec 0 25, ,000 2 Jan 0 25, ,000 3 Feb 4,053,039 25, ,078,039 4 Mar 4,114,699 25, ,139,699 5 Apr 4,176,359 25, ,201,359 6 May 4,238,019 25, ,605 5,229,624 7 Jun 4,313,709 25, ,797 5,323,506 8 Jul 4,377,707 25, ,102 5,395,809 9 Aug 4,441,705 25,000 1,001,407 5,468, Sep 4,505,703 25,000 1,009,712 5,540, Oct 4,569,701 25,000 1,018,017 5,612, Nov 4,633,699 25,000 1,026,322 5,685, Dec 0 25, , , Avg(1) 3,618,695 25, ,608 4,263,303 =========== =========== =========== =========== (2) Non Utility includes Account

19 Page: 19 of 120 WPC1-1b.1 Statement H Page 1 of 15 Gas Operation and Maintenance Expenses Ln Total Operation and Maintenance Expense Amount Production - Gas Purchases: 1 Energy 95,127,936 (Hp15) 2 Dem-Peak Day (D-1) 0 (Hp15) 3 Other COG 0 (Hp15) Total Prod-Gas Purch.: 95,127,936 Production - Other: 5 Energy 867,101 (Hp3) 6 Dem-Peak Day (D-1) 1,373,995 (Hp3) 7 Other COG 0 (Hp3) Total Prod-Other: 2,241,096 9 Transmission 561,010 (Hp3) 10 Distribution 16,970,234 (Hp3) 11 Storage 768,207 (Hp3) 12 Customer Accounts 14,560,807 (Hp4) 13 Customer Service 4,226,397 (Hp4) 14 Sales 0 (Hp4) 15 Total Operation and Maintenance Expense 134,455,687 Note: The CUST portion of Ad & Gen from H2 line 12 is apportioned between customer accounts, customer service, and sales based on their relative percentages from AML. H1

20 Page: 20 of 120 WPC1-1b.2 Statement H Page 2 of 15 Gas Operation and Maintenance Expenses Date Performed: 4/29/15 8:34 Pk Day Other Trans- Distri- Ln Gas Energy Demand COG mission bution Storage Cust 1 En Pur 95,127,936 95,127,936 2 D-1 Dem Other Tot Pur 95,127,936 95,127, Prod Cost Rem Pro 1,280, , , Tot Pro 96,408,721 95,995, , Transmi 400, ,217 9 Distrib 9,022,880 9,022, Storage 509, , Cust Acc 11,256,603 11,256, Cust Srv 3,424,381 3,424, Sales A & G(1) 13,432, , ,793 7,947, ,303 4,106, Tot O&M 134,455,687 95,995,037 1,373, ,010 16,970, ,207 18,787,204 =========== =========== =========== =========== =========== =========== =========== =========== (1) Split on the basis of Salaries and Wages: Allocation Method L. Production and Transmission salaries and wages ratios added to determine Demand Ratio. H2

21 Page: 21 of 120 WPC1-1b.3 Statement H Page 3 of 15 Jurisdictional O & M by Function Date Performed: 4/29/15 8:34 Pk Day Other Trans- Distri- Cust- Ln Energy Demand COG mission bution Storage omer Total 1 O&M less A&G 95,127, ,217 9,022, ,904 14,680, ,741,921 & Other Prod 2 less PBAB Amount 95,127, ,217 9,022, ,904 14,680, ,741,919 Other Prod Cost: 4 Remain Prod 867, , ,280,786 5 Prod Cost Other Cost 867, , ,280,786 A & G: 7 A&G By Funct , ,793 7,947, ,303 4,106,220 13,432, A&G 0 960, ,793 7,947, ,303 4,106,220 13,432, TOT O&M 95,995,035 1,373, ,010 16,970, ,207 18,787, ,455,685 ========== ========== ========== ========== ========== ========== ========== ========== H3

22 Page: 22 of 120 WPC1-1b.4 Statement H Page 4 of 15 MGU Jurisdictional Customer Amounts Customer Customer Customer Ln Accounts Services Sales Total 1 Accts 11,256, ,256,603 2 Serv 0 3,424, ,424,381 3 Sales A&G 3,304, , ,106,220 5 Total 14,560,807 4,226, ,787,204 ============ ============ ============ ============ Note: The CUST portion of Ad & Gen from H2 line 12 is apportioned between customer accounts, customer service, and sales based on their relative percentages from AML. H4

23 Page: 23 of 120 WPC1-1b.5 Statement H Page 5 of 15 Gas Utility Operation and Maintenance Expense PRODUCTION PLANT Gas Steam Production Energy Demand Direct Total Ln Operation 1 Acct Total Operation Maint'nce Total Maint'nce Total Steam Liquified Gas Production Operation , , Total Operation 0 413, ,685 Maint'nce Total Maint'nce Total Liq Gas 0 413, ,685 Natural Gas Production Operation Total Nat Gas Other Gas Supply COG 279, , COG 98,646, ,646, Bal-COG 928, , COG -4,430, ,430, COG -296, , Oth 637, , , , Total Other 95,995, ,995, Total Production 95,995, , ,408,721 ========== ========== ========== ========== H5

24 Page: 24 of 120 WPC1-1b.6 Statement H Page 6 of 15 Gas Utility Operation and Maintenance Expense Transmission Expenses Transmission Function Total Ln Operation 1 Acct 850 9, , , ,132 5 Total Operation 209,177 Maint'nce , , Total Maint'nce 191, Total Transmission 400,217 ======== H52

25 Page: 25 of 120 WPC1-1b.7 Statement H Page 7 of 15 Gas Utility Operation and Maintenance Expense Distribution Expenses Distribution Function Total Ln Operation 1 Acct , , , , , , ,016, ,380, , Total Operation 7,572,955 Maint'nce , , , , , , , Total Maint'nce 1,449, Total Distribution 9,022,880 ========

26 Page: 26 of 120 WPC1-1b.8 Statement H Page 8 of 15 Gas Utility Operation and Maintenance Expense Storage Expenses Storage Function Total Ln Operation 1 Acct , , , , , , , , Total Operation 405,720 Maint'nce , , , , , , , , Total Maint'nce 104, Total Storage 509,904 ======== H53

27 Page: 27 of 120 WPC1-1b.9 Statement H Page 9 of 15 Gas Utility Operation and Maintenance Expense Customer Accounts, Service, Sales and A&G Customer Accounts Total Ln 1 Acct , ,085, ,804, ,490, M ,713 7 Total Accounts 11,256,603 ======== Customer Services , M 2,526, , , Total Services 3,424,381 ======== Sales Total Sales 0 ======== A & G ,211, ,306, , , ,158, ,652, , ,482, , Total A & G 13,432,981 ======== H7

28 Page: 28 of 120 WPC1-1b.10 Statement H Page 10 of 15 Gas Utility Salaries and Wages PRODUCTION PLANT Steam Power Generation Energy Demand Direct Total Ln Operation 1 Acct Total Operation Maint'nce Total Maint'nce Total Steam Liquified Gas Production Operation Total Operation Maint'nce Total Maint'nce Natural Gas Production Operation Total Nat Gas Other Gas Supply Oth 550, , , , Total Other 550, , , Total Production 550, , ,451 ========== ========== ========== ========== H10

29 Page: 29 of 120 WPC1-1b.11 Statement H Page 11 of 15 Gas Utility Salaries and Wages Distribution Expenses Operation Total Ln 1 Acct , , , , , , , ,516, Total Operation 5,217,141 Maint'nce , , , , , , , Total Maint'nce 910, Total Distribution 6,127,877 ======== H9

30 Page: 30 of 120 WPC1-1b.12 Statement H Page 12 of 15 Gas Utility Salaries and Wages Transmission Expenses Transmission Function Total Ln Operation 1 Acct 850 6, , , ,340 5 Total Operation 28,379 Maint'nce , , Total Maint'nce 95, Total Transmission 123,981 ======== H92

31 Page: 31 of 120 WPC1-1b.13 Statement H Page 13 of 15 Gas Utility Salaries and Wages Storage Expenses Storage Function Total Ln Operation 1 Acct , , , , , ,865 9 Total Operation 167,073 Maint'nce , , , , , , , Total Maint'nce 32, Total Storage 199,162 ======== H93

32 Page: 32 of 120 WPC1-1b.14 Statement H Page 14 of 15 Gas Utility Salaries and Wages Customer Accounts, Service, Sales and A&G Customer Accounts Total Ln 1 Acct , ,599, , M ,839 7 Total Accounts 2,547,731 ======== Customer Services , W , Total Services 618,398 ======== Sales Total Sales 0 ======== A & G ,174, , , , , Total A & G 4,338,032 ======== H10

33 Page: 33 of 120 WPC1-1b.15 Statement H Page 15 of 15 Operation and Maintenance Expenses Gas Purchased Power SUMMARY ENERGY(1) PEAK DAY DEM(2) OTHER(3) TOTAL Corp. Corp. Corp. Commodity D-1 OTHER CORPORATE Ln Purchases COG COG 1 Jan 16,121, ,121,888 2 Feb 19,960, ,960,933 3 Mar 9,050, ,050,649 4 Apr 12,507, ,507,865 5 May 5,541, ,541,247 6 Jun -2,031, ,031,088 7 Jul 2,560, ,560,550 8 Aug 1,687, ,687,173 9 Sep 3,150, ,150, Oct 4,049, ,049, Nov 9,020, ,020, Dec 13,508, ,508, Tot 95,127, ,127,936 ============ ============ ============= ============ H11 Includes the following accounts: (1) , , , /221, /231, /241/243, , /321, , /421, /441, /451, , , /521, /614, /102, /204,

34 Page: 34 of 120 WPC1-1c.1 Statement I Page 1 of 1 Depreciation Expense Straight Line Product Trans- Distri- Ln Demand mission bution Storage General Total Jan 32 51, ,254 35, , ,472 2 Feb 32 51, ,913 35, , ,103 3 Mar 32 51, ,394 35, , ,643 4 Apr 32 51, ,555 35, , ,734 5 May 32 51, ,270 35, , ,377 6 Jun 32 51, ,365 35, , ,834 7 Jul 32 51, ,003 35, , ,870 8 Aug 32 51, ,680 35, , ,792 9 Sep , ,326 35, , , Oct , ,081 35, , , Nov , ,131 35,215 98, , Dec , ,801 35, , , Total 1, ,364 6,404, ,139 1,226,842 8,679, Gen(1) 126,319 21,151 1,045,396 33,976-1,226, Total 127, ,515 7,450, , Total Corp. 8,679,266 ========== (1)Functionalized based on Salaries and Wages. See Allocation Method L.

35 Page: 35 of 120 WPC1-1h Statement J Page 1 of 2 Income Taxes LN CORPORATE 1 Federal Income Tax 5,922,765 2 State Income Tax 876,749 3 Operating Income Taxes 6,799,514 ============ Income Taxes on Other Income: 4 Federal 0 5 State 0 6 Other Income Taxes 0 ============ 7 Total Income Tax Expense 6,799,514 ============ The Federal Income Tax rate is: 0.35 The State Income Tax rate is: The Composite Income Tax rate is: The Income Tax Factor is:

36 1M WPC1-1i.2 Page: 36 of 120 Statement J Page 2 of 2 Allocation Method Reference Sheet for Taxes Year Ending Dec. 31, 2014 ( #) ALLOCATION METHOD ( #) STATEMENT SOURCE AMOUNT ( 1) Rate Base ( 1) M, Page ( 2) Energy-BCR ( 2) M-2, Page ( 3) Energy-RET ( 3) M-2, Page ( 4) Energy-WHL ( 4) Not Applicable ( 5) Demand-BCR ( 5) M-3, Page ( 6) Demand-RET ( 6) M-3, Page ( 7) Demand-WHL ( 7) Not Applicable ( 8) Transmission-BCR ( 8) Not Applicable ( 9) Transmission-RET ( 9) Not Applicable (10) Transmission-WHL (10) Not Applicable (11) Dist Plant-BCR (11) M-1, Page (12) Dist Plant-RET (12) M-1, Page (13) Dist Plant-WHL (13) Not Applicable (14) Dist S/L Acc Dep-BCR (14) M-1, Page (15) Dist S/L Acc Dep-RET (15) M-1, Page (16) Dist S/L Acc Dep-WHL (16) Not Applicable (17) Dist T/S Acc Dep-BCR (17) Not Applicable (18) Dist T/S Acc Dep-RET (18) Not Applicable (19) Dist T/S Acc Dep-WHL (19) Not Applicable (20) Dist S/L Dep Exp-BCR (20) M-1, Page (21) Dist S/L Dep Exp-RET (21) M-1, Page (22) Dist S/L Dep Exp-WHL (22) Not Applicable (23) Dist T/S Dep Exp-BCR (23) M-1, Page (24) Dist T/S Dep Exp-RET (24) M-1, Page (25) Dist T/S Dep Exp-WHL (25) Not Applicable (26) Dist-O&M-BCR (26) M-1, Page (27) Dist-O&M-RET (27) M-1, Page (28) Dist-O&M-WHL (28) Not Applicable (29) Customer-BCR (29) Alloc Method G (30) Customer-RET (30) Alloc Method G (31) Customer-WHL (31) Not Applicable (32) General & Common-BCR (32) Alloc Method L (33) General & Common-RET (33) Alloc Method L (34) General & Common-WHL (34) Not Applicable (35) Direct-Wisconsin (35) Not Applicable (36) Direct-Michigan (36) Direct (37) Direct-Wholesale (37) Not Applicable (38) Revenue (38) Alloc Method S (39) Michigan Tax Liab (39) Direct J-1, Page (40) T/S Deprec Expense (40) I, Page

37 Page: 37 of 120 WPC1-1i1 Statement J-1 Page 1 of 3 Operating Federal Income Tax Computation LN CORPORATE 1 Book Income Before 2 Incm Txs & Int Exp 21,459,751 3 Interest Expense (1) 3,759,418 4 Income Reconcil. -23,390,096 5 Mich. apportionment 0 6 Taxable Income -5,689,763 7 Tax Rate Taxes Calculated -1,991,417 9 Surtax Exemption 0 10 Amort Tx Ref/Pymnt 0 11 I.T.C. Earned 0 12 Tax Liability -1,991, Net Tax Adj. 7,914, Adj Tax Liability 5,922, Account (Rnd) 5,922, I.T.C. Net (2) 0 17 Taxes Allowable 5,922,765 ============ Adj. Tax Liability (1) Includes interest related to Long-Term Debt, Short-Term Debt, and Other Interest Bearing Accounts. (2) ITC reduces income tax expense, which is required for us to apply weighted cost of permanent capital as shown on Ex A-4, Sch D Accrual Basis Adjustment 0 21 Actual Basis Jurisdictional Base Allocation %

38 Page: 38 of 120 WPC1-1i2 Statement J-1 Page 2 of 3 Operating State Income Tax Computation LN CORPORATE 1 Book Income Before 2 Incm Txs & Int Exp 21,459,751 3 Interest Expense (1) 3,759,418 4 Income Reconcil. -10,554,112 5 Mich. apportionment 0 6 Taxable Income 7,146,221 7 Tax Rate Taxes Calculated 428,600 9 Surtax Exemption 0 10 Amort Tx Ref/Pymnt 0 11 I.T.C. Earned 0 12 Tax Liability 428, Net Tax Adj. 474, Adj Tax Liability 902, Account (Rnd) 902, I.T.C. Net (2) -25, Taxes Allowable 876,749 ============ Adj. Tax Liability (1) Includes interest related to Long-Term Debt, Short-Term Debt, and Other Interest Bearing Accounts. (2) ITC reduces income tax expense, which is required for us to apply weighted cost of permanent capital as shown on Ex A-4, Sch D Accrual Basis Adjustment 0 21 Actual Basis Jurisdictional Base Allocation %

39 Page: 39 of 120 WPC1-1w.4 Statement J-1 Page 3 of 3 Federal Income Tax Deductions - Interest Synchronization Ln MGU 1 Rate Base 221,255,729 2 x Wght Cost of Debt Total Interest 3,987,938 4 AFUDC Debt 0 5 Synchronized Intrst 3,987,938 ============ 1 See WPC1-1.(Mp.1) 2 See Exhibit A-4, Sch D-1. Includes weighted cost of Long-Term Debt and Short-Term Debt. Excludes weighted cost of Other Interest Bearing accounts. 4 J-2 p1

40 Page: 40 of 120 WPC1-1p Statement J-2 Page 1 of 2 Reconciliation of Reported Net Income with Taxable Income for Federal Income Taxes Ln Additional income and unallowable deductions: Corporate 1 (SM) Customer-BCR (29) 918,472 Total Additions 918,472 Additional deductions and non-taxable income: Corporate 1 (SM) Rate Base ( 1) -332,972 2 (SM) Demand-BCR ( 5) -4,160,090 3 (SM) Transmission-BCR ( 8) -4,338,377 4 (SM) Dist Plant-BCR (11) -9,842,532 5 (SM) General & Common-BCR (32) -4,887,605 6 (SM) Storage-WHL (43) -318,392 7 (SM) Michigan Tax Liab (39) -428,600 Total Deductions -24,308,568 Net Income Adds/Deducts -23,390,096 ============

41 Page: 41 of 120 WPC1-1q Statement J-2 Page 2 of 2 Reconciliation of Reported Net Income with Taxable Income for State Income Taxes Ln Additional income and unallowable deductions: Corporate 1 (SM) Customer-BCR (29) 918,472 2 (SM) General & Common-BCR (32) 1,869,865 Total Additions 2,788,337 Additional deductions and non-taxable income: Corporate 1 (SM) Rate Base ( 1) -332,972 2 (SM) Demand-BCR ( 5) -4,157,397 3 (SM) Transmission-BCR ( 8) -2,523,681 4 (SM) Dist Plant-BCR (11) -6,136,806 5 (SM) Storage-WHL (43) -191,593 Total Deductions -13,342,449 Net Income Adds/Deducts -10,554,112 ============

42 Page: 42 of 120 WPC1-1t Statement J-3 Page 1 of 2 Adjustments to Tax Liability to Arrive at Tax Provision for Federal Income Taxes Ln Tax effect of deferred expense net: Corporate 1 (NOT) Rate Base ( 1) 391,253 2 (NOT) Demand-BCR ( 5) 1,840,629 3 (NOT) Transmission-BCR ( 8) 1,582,544 4 (NOT) Dist Plant-BCR (11) 3,533,324 5 (NOT) Customer-BCR (29) -936,755 6 (NOT) General & Common-BCR (32) 2,830,621 7 (NOT) Direct-Michigan (36) -1,452,501 8 (NOT) Storage-WHL (43) 125,067 Net-of-Tax Total 7,914,182 ============

43 Page: 43 of 120 WPC1-1u Statement J-3 Page 2 of 2 Adjustments to Tax Liability to Arrive at Tax Provision for State Income Taxes Ln Tax effect of deferred expense net: Corporate 1 (NOT) Rate Base ( 1) 34,333 2 (NOT) Demand-BCR ( 5) 205,130 3 (NOT) Transmission-BCR ( 8) 158,176 4 (NOT) Dist Plant-BCR (11) 213,165 5 (NOT) Customer-BCR (29) -103,799 6 (NOT) General & Common-BCR (32) 181,006 7 (NOT) Direct-Michigan (36) -225,720 8 (NOT) Storage-WHL (43) 11,767 Net-of-Tax Total 474,058 ============

44 Page: 44 of 120 WPC1-1w.1 Statement J-4 Page 1 of 3 Investment Tax Credit - Earned Production Trans- Distri- Energy Demand mission bution Storage Customer Total Ln 1 Total , ,909 ========= ========= ========= ========= ========= ========= ========= Investment Tax Credit - Restored Account Production Trans- Distri- Energy Demand mission bution Storage Customer Total Ln 2 Total ========= ========= ========= ========= ========= ========= ========= Program Name = J4A

45 Page: 45 of 120 WPC1-1w. 2 Statement J-4 Page 2 of 3 Investment Tax Credit - Earned Account Production Trans- Distri- Energy Demand mission bution Storage General Total Ln 1 Jan , ,955 2 Feb , ,955 3 Mar , ,955 4 Apr , ,955 5 May , ,955 6 Jun , ,955 7 Jul , ,955 8 Aug , ,955 9 Sep , , Oct , , Nov , , Dec , , Total , ,909 Customer 14 Gen(2) Total , ========= ========= ========= ========= ========= ========= 16 Total Corp -25,909 =========== (2) Functionalized based on Salaries & Wages: See Allocation Method L. Program Name = J4B

46 Page: 46 of 120 WPC1-1w. 3 Statement J-4 Page 3 of 3 Investment Tax Credit - Restored Account Production Trans- Distri- Energy Demand mission bution Storage General Total Ln 1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Customer 14 Gen(2) Total ========= ========= ========= ========= ========= ========= 16 Total Corp 0 =========== (2) Functionalized based on Salaries & Wages: See Allocation Method L. Program Name = J4B

47 Page: 47 of 120 WPC1-1w.1 Statement J-5 Page 1 of 2 Tax Amortizations (419/426/431) Misc Inc./Deducts - After Tax Production Trans- Distri- Ln Energy Demand mission bution Storage General Customer Ratebase Total 1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Energy Demand Trans Dist Strg Customer Ratebase 14 Gen(*) Total Resp ========= ========= ========= ========= ========= ========= ========= 18 Total Corp 0 ========== (*) Functionalized based on Salaries and Wages. See Allocation Method L. Reference to Retail and Wholesale refers to subaccounting of records to recognize accounting procedure differences between Retail and Wholesale commissions. The Basic Cost Record represents the portion which can be uniformly accounted for in all jurisdictions. Program Name = J5A

48 Page: 48 of 120 WPC1-1w.1 Statement J-5 Page 2 of 2 Tax Amortizations (409) Misc Inc/Deducts - After Tax Production Trans- Distri- Ln Energy Demand mission bution Storage General Customer Ratebase Total 1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Energy Demand Trans Dist Strg Customer Ratebase 14 Gen(*) Total ========= ========= ========= ========= ========= ========= ========= 18 Total Corp 0 ========== (*) Functionalized based on Salaries and Wages. See Allocation Method L. Reference to Retail and Wholesale refers to subaccounting of records to recognize accounting procedure differences between Retail and Wholesale commissions. The Basic Cost Record represents the portion which can be uniformly accounted for in all jurisdictions. Program Name = J5B

49 Page: 49 of 120 WPC1-2 Statement J-8 Page 1 of 1 AFUDC Income GAS AFUDC - Debt and Equity Portions Trans- Distri- Ln Energy Demand mission bution Storage General Total 1 Debt , ,798 2 Equity , , ,412 3 Total , , ,210 ========= ========= ========= ========= ========= ========= =========

50 Page: 50 of 120 WPC1-1f Statement K Page 1 of 3 Taxes Other Than Income Taxes Allocation Percentage Calculations Production Trans- Distri- Ln Total Energy Demand mission bution Storage Customer Direct 1 Sal & Wages 1,055, ,449 12, ,404 20, , Ratebase 3,822, ,559 57, ,228 2,753, , Total 4,877, , , ,861 3,377, , ,615 0 ======== ======== ======== ======== ======== ======== ======== ========

51 Page: 51 of 120 WPC1-1f.1 Statement K Page 2 of 3 Gas Taxes Other Than Income Taxes by Function and by Cost Component LN FUNCTIONALIZATION BASIS GAS UTILITY FEDERAL 1 Retirement Benefits 675,141 L 2 Unemployment Comp. 5,242 L 3 PR Taxes Credited 0 L 4 Super Fund Tax 0 N 5 Highway Use Tax 0 N 6 Fed Excise Tax 796 N STATE-MICHIGAN 7 Gross Receipts Tax 0 N 8 Unemployment Comp. 30,717 L 9 Remain. Assessment 0 10 Use Tax 3,461 N 11 Unauthor. Ins. Tax 28,259 N 12 Wis Recycling Fee 0 N 13 Single Business Tax 0 N 14 Property Tax 3,789,581 N LOCAL-MICHIGAN 15 Real Est & Property 0 N IBS 16 IBS Payroll Tax 344,296 L OTHER 17 Franchise Tax Fees 125 N 18 State Unitary Fees 155 N Fn Alloc Method 19 Total TOTIT 4,877,771 ======== Functionalization Methods: L = Allocation Method L - Salaries & Wage N = Allocation Method N - Ratebase

52 Page: 52 of 120 WPC1-1f.1 Statement K Page 3 of 3 Taxes Other Than Income Taxes Allocation Percentage Calculations Production Trans- Distri- Ln Total Energy Demand mission bution Storage Customer Direct 1 AML ======= ======= ======= ======= ======= ======= ======= 2 AMN ======= ======= ======= ======= ======= ======= ======= These allocation percentages are used on page K2.

53 Page: 53 of 120 WPC1-1 Statement M Page 1 of 3 Cost of Service LN Gas SOURCE 1 Present Rates 165,967,789 2 Energy Optimizatn 3,143,308 3 Power Department 0 4 Tot Present Rates 169,111,097 5 Other Adjustments 361,378 WPC1-1f(i)(M-5p1) 6 Total Revenue 169,472,475 7 Gas Purchases 95,127,936 WPC1-1b.1 (H1) 8 Other O&M Exp. 39,327,751 WPC1-1b.1 (H1) 9 Total O&M Expense 134,455, Depr Expense-S/L 8,679,266 WPC1-1c.1 (I1) 11 Amort.- 406/407 0 WPC1-1c.6 12 Taxes other than Income Taxes 4,877,771 WPC1-1d (K1) 13 Operating Income 21,459, Other Inc. & Adjustments Before Taxes 0 WPC1-1f(ii) (M5p2) 15 Income before Income Taxes 21,459, Income Taxes 6,799,514 WPC1-1i.1 (J1) 17 NET INCOME 14,660, Other Inc & Adjustments After Taxes 0 WPC1-1f(ii) (M5p2) 19 ADJUSTED NET INC 14,660,237 ========= 20 Rate Base 221,255,728 Schedule B-1 (Mp2) =========

54 Page: 54 of 120 Allocation P Statement M Page 2 of 3 Rate Base LN Gas SOURCE 1 Gross Plant 338,839,245 WPB6-1c (D1) 2 Accum Deprec 179,354,744 WPB6-4c (E1) 3 Net Plant 159,484,501 4 C W I P 6,671,958 WPB6-3c (D-1p1) 5 Fut Use Plt 0 WPB6-2b (F4) 6 Plant Total 166,156,459 ======== 7 Workng Capital 36,973,138 WPB3-2 (F3) 8 *Cash & Bank 1,225,628 WPB3-3a (F6) 9 *Fuel Stock 0 WPB3-4b (F1) 10 *Material & Sup 683,519 WPB3-4b (F1) 11 *Gas Storage 15,846,427 WPB3-4b (F1) 12 *Prepayments 579,052 WPB3-5c (F5) 13 Sub-Total 55,307,764 ======== 14 Othr Prop & Inv 3,643,694 WPB1-1c (F8) 15 Sub-Total 3,643,694 ======== Deduct: 16 *Taxes 3,852,188 WPB3-6a (F7) 17 Cust Advances 0 WPB5-7a (F2) 18 Sub-Total 3,852,188 ======== 19 RATE BASE 221,255,729 ======== * = WORKING CAPITAL COMPONENT. Total cross checks to SCH. B-3.

55 Page: 55 of 120 Statement M Page 3 of 3 Total Gas Revenue Requirements Date Performed: 4/29/15 8:34 Ln ENERGY DEM TRANS DIST STRG CUST DIRECT/RB TOTAL 1 Prod 95,995, , ,408,722 2 Trans , ,217 3 Dist ,022, ,022,880 4 Storage , ,904 5 Cus Acc ,256, ,256,603 6 Cus Ser ,424, ,424,381 7 Sales A & Gen 0 960, ,793 7,947, ,303 4,106, ,432,980 9 Tot Op 95,995,037 1,373, ,010 16,970, ,207 18,787, ,455, Depr 0 127, ,515 7,450, , ,679, Dep TOTIT 327, , ,861 3,377, , , ,877, Inc Tax 584, , ,804 4,916, , ,825, ITC Def , , Tot Exp 96,907,500 1,735,832 2,579,191 32,688,398 1,791,498 19,109, ,812, Other Income & Adjs , , , , Tx Amrt Return 1,256, ,804 1,872,537 10,559, , ,660, Ret Def -117,271-20, , ,698-70, ,368, Additional Inc Tax -74,702-13, , ,890-44, , Rev Req 97,971,836 1,921,201 4,165,591 42,406,848 2,429,404 18,698, , ,870,904 Rev Req as % 22 of Tot ========== ========== ========== ========== ========== ========== ========== ========== Note: Lines 13, 17, 18, and 19 are allocated based on Allocation Method N

56 Page: 56 of 120 Allocation Method C Statement M-1 Page 1 of 6 Determination of Percentage of Distribution Plant Used to Serve MGU Customers Total Ln Account Gas , , ,143, ,591, , ,594, , 383, ,538, , Total 248,496,802 =========