Exhibit 99(f) System Energy Resources, Inc. Computation of Ratios of Earnings to Fixed Charges and Ratios of Earnings to Fixed Charges March 31, 1992 1993 1994 1995 1996 1997 Fixed charges, as defined: Interest on long-term debt $196,618 $184,818 $162,517 $136,916 $128,704 $120,979 Interest on notes payable -- -- 88 473 289 206 Amortization of expense and premium on debt-net 6,417 4,520 6,731 6,104 6,672 7,202 Interest applicable to rentals 6,265 6,790 7,546 6,475 6,223 5,617 Other interest charges 1,506 1,600 7,168 8,019 8,055 7,929 -------------------------------------------------------------------------- Total fixed charges, as defined $210,806 $197,728 $184,050 $157,987 $149,943 $141,933 ========================================================================== Earnings as defined: Net Income $130,141 $93,927 $5,407 $93,039 $98,668 $ 99,483 Add: Provision for income taxes: Federal and State 35,082 48,314 67,477 120,830 33,146 34,124 Deferred Federal and State - net 23,648 60,690 (27,374) (41,871) 52,447 49,776 Investment tax credit adjustment - net 30,123 (30,452) (3,265) (3,466) (3,472) (3,472) Fixed charges as above 210,806 197,728 184,050 157,987 149,943 141,933 -------------------------------------------------------------------------- Total earnings, as defined $429,800 $370,207 $226,295 $326,519 $330,732 $321,844 ========================================================================== Ratio of earnings to fixed charges, as defined 2.04 1.87 1.23 2.07 2.21 2.27 ==========================================================================