EXHIBIT (12) COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS Twelve Months Ended September 30, 1997 Income before provision for income taxes and fixed $52,767,534 charges (Note A) Fixed charges: Interest on first mortgage bonds $15,357,870 Amortization of debt discount and expense less 884,630 premium Interest on short-term debt 1,053,597 Other interest 326,201 Rental expense representative of an interest factor 161,612 (Note B) Total fixed charges 17,783,910 Preferred stock dividend requirements: Preferred stock dividend requirements not 2,338,304 deductible for tax purposes Ratio of income before provision for incomes taxes 1.527 to net income Nondeductible dividend requirements 3,570,590 Deductible dividends 78,036 Total preferred stock dividend requirements 3,648,626 Total combined fixed charges and preferred stock dividend $21,432,536 requirements Ratio of earnings to fixed charges 2.97X Ratio of earnings to combined fixed charges and preferred stock dividend requirements 2.46x <FOOTNOTE> NOTE A: For the purpose of determining earnings in the calculation of the ratio, net income has been increased by the provision for income taxes, non-operating income taxes and by the sum of fixed charges as shown above. NOTE B: One-third of rental expense (which approximates the interest factor).