Exhibit 99(a) Entergy Arkansas, Inc. Computation of Ratios of Earnings to Fixed Charges and Ratios of Earnings to Combined Fixed Charges and Preferred Dividends September30, 1992 1993 1994 1995 1996 1997 Fixed charges, as defined: Total Interest Charges 124,101 119,591 110,814 115,337 106,716 106,674 Interest applicable to rentals 17,657 16,860 19,140 18,158 19,121 18,390 ------------------------------------------------------------------- Total fixed charges, as defined 141,758 136,451 129,954 133,495 125,837 125,064 Preferred dividends, as defined (a) 32,195 30,334 23,234 27,636 24,731 17,281 ------------------------------------------------------------------- Combined fixed charges and preferred $173,953 $166,785 $153,188 $161,131 $150,568 $142,345 dividends, as defined =================================================================== Earnings as defined: Net Income $130,529 $205,297 $142,263 $136,666 $157,798 138,211 Add: Provision for income taxes: Total 50,590 82,337 29,220 72,081 84,445 76,494 Fixed charges as above 141,758 136,451 129,954 133,495 125,837 125,064 ------------------------------------------------------------------- Total earnings, as defined $322,877 $424,085 $301,437 $342,242 $368,080 $339,769 =================================================================== Ratio of earnings to fixed charges, as defined 2.28 3.11 2.32 2.56 2.93 2.72 =================================================================== Ratio of earnings to combined fixed charges and preferred dividends, as defined 1.86 2.54 1.97 2.12 2.44 2.39 =================================================================== - ------------------------ (a) "Preferred dividends," as defined by SEC regulation S-K, are computed by dividing the preferred dividend requirement by one hundred percent (100%) minus the income tax rate.