Exhibit 99(f) System Energy Resources, Inc. Computation of Ratios of Earnings to Fixed Charges and Ratios of Earnings to Fixed Charges Twelve Months Ended Sept 30, 1997 1998 1999 2000 2001 2002 Fixed charges, as defined: Total Interest $128,653 $116,060 $147,982 $118,519 $138,018 $75,894 Interest applicable to rentals 6,065 5,189 3,871 5,753 4,458 3,391 --------------------------------------------------------- Total fixed charges, as defined $134,718 $121,249 $151,853 $124,272 $142,476 $79,285 ========================================================= Earnings as defined: Net Income $102,295 $106,476 $82,375 $93,745 $116,355 114,179 Add: Provision for income taxes: Total 74,654 77,263 53,851 81,263 43,761 65,330 Fixed charges as above 134,718 121,249 151,853 124,272 142,476 79,285 --------------------------------------------------------- Total earnings, as defined $311,667 $304,988 $288,079 $299,280 $302,592 $258,794 ========================================================= Ratio of earnings to fixed charges, as defined 2.31 2.52 1.90 2.41 2.12 3.26 =========================================================