Exhibit 12.1 West Texas Utilities Company Consolidated Ratio of Earnings to Fixed Charges For The Twelve Months Ended March 31, 2001 and Years Ended December 31, 2000 Twelve Months Ended 3/31/01 2000 1999 1998 1997 1996 (thousands, except ratios) Operating Income $47,599 $52,341 $53,799 $59,276 $44,584 $49,558 Adjustments Income Taxes (1,134) 6,552 4,186 28,088 11,294 6,547 Provision for Deferred Income Taxes 14,003 8,164 12,026 (6,626) (945) 4,546 Deferred Investment Tax Credits (1,271) (1,271) (1,275) (1,321) (1,321) (1,321) Changes for Investments and Plant Development Costs, Net of Tax - - - - - (10,946) Other Income and Deductions (204) (1,787) 2,126 2,034 1,237 601 Allowance for Borrowed and Equity Funds Used During Construction 1,529 1,416 1,025 1,347 920 1,276 Earnings $60,522 $65,415 $71,887 $82,798 $55,769 $ 50,261 Fixed Charges: Interest on Long-term Debt $17,140 $18,017 $20,352 $20,352 $20,352 $21,169 Interest on Short-term Debt 7,629 6,503 4,731 4,580 4,911 4,925 Fixed Charges $24,769 $24,520 $25,083 $24,932 $25,263 $26,094 Ratio of Earnings to Fixed Charges 2.44 2.66 2.86 3.32 2.20 1.92