COMPUTATION OF RATIO OF EXHIBIT 12 EARNINGS TO FIXED CHARGES (UNAUDITED) Fiscal Year Ended September 30 ------------------------------------------------- 1995 1994 1993 1992 1991 ------------------------------------------------- EARNINGS: Income Before Interest Charges (2) $128,061 $127,885 $125,742 $118,222 $110,240 Allowance for Borrowed Funds Used in Construction 195 209 174 1,088 2,278 Federal Income Tax 30,522 36,630 21,148 17,680 (3,929) State Income Tax 4,905 6,309 2,979 3,426 341 Deferred Inc. Taxes - Net (3) 8,452 4,853 16,919 14,125 26,873 Investment Tax Credit - Net (672) (682) (693) (706) (738) Rentals (1) 5,422 5,730 5,621 5,857 4,915 $176,885 $180,934 $171,890 $159,692 $139,980 FIXED CHARGES: Interest & Amortization of Premium and Discount of Funded Debt $40,896 $36,699 $38,507 $39,949 $41,916 Interest on Commercial Paper and Short-Term Notes Payable 6,745 5,599 7,465 12,093 11,933 Other Interest (2) 4,721 3,361 4,727 6,958 9,679 Rentals (1) 5,422 5,730 5,621 5,857 4,915 $57,784 $51,389 $56,320 $64,857 $68,443 RATIO OF EARNINGS TO FIXED CHARGES 3.06 3.52 3.05 2.46 2.05 Notes: (1) Rentals shown above represent the portion of all rentals (other than delay rentals) deemed representative of the interest factor. (2) Fiscal 1995, 1994, 1993 and 1992 reflect the reclassification of $1,716, $1,674, $1,374 and $1,129, respectively, representing the loss on reacquired debt amortized during each period, from Other Interest Charges to Operation Expense. (3) Deferred Income Taxes - Net for fiscal 1994 excludes the cumulative effect of changes in accounting.