Exhibit 99(f) System Energy Resources, Inc. Computation of Ratios of Earnings to Fixed Charges and Ratios of Earnings to Fixed Charges December 31, September 30, 1992 1993 1994 1995 1996 1997 Fixed charges, as defined: Total Interest 204,541 190,938 176,504 151,512 143,720 128,736 Interest applicable to rentals 6,265 6,790 7,546 6,475 6,223 5,958 -------------------------------------------------------------------- Total fixed charges, as defined $210,806 $197,728 $184,050 $157,987 $149,943 $134,694 ==================================================================== Earnings as defined: Net Income $130,141 $93,927 $5,407 $93,039 $98,668 $99,894 Add: Provision for income taxes: Total 88,853 78,552 36,838 75,493 82,121 78,434 Fixed charges as above 210,806 197,728 184,050 157,987 149,943 134,694 -------------------------------------------------------------------- Total earnings, as defined $429,800 $370,207 $226,295 $326,519 $330,732 $313,022 ==================================================================== Ratio of earnings to fixed charges, as defined 2.04 1.87 1.23 2.07 2.21 2.32 ====================================================================