Exhibit 99(d) Entergy Mississippi, Inc. Computation of Ratios of Earnings to Fixed Charges and Ratios of Earnings to Combined Fixed Charges and Preferred Dividends September 30, 1992 1993 1994 1995 1996 1997 Fixed charges, as defined: Total Interest 64,066 55,359 52,764 51,635 48,007 46,339 Interest applicable to rentals 521 1,264 1,716 2,173 2,165 2,299 -------------------------------------------------------- Total fixed charges, as defined 64,587 56,623 54,480 53,808 50,172 48,638 Preferred dividends, as defined (a) 12,823 12,990 9,447 9,004 7,720 6,493 -------------------------------------------------------- Combined fixed charges and preferred dividends, as defined $77,410 $69,613 $63,927 $62,812 $57,892 $55,131 ======================================================== Earnings as defined: Net Income $65,036 $101,743 $48,779 $68,667 $79,210 63,348 Add: Provision for income taxes: Total income taxes 23,147 55,993 12,476 34,877 41,107 31,069 Fixed charges as above 64,587 56,623 54,480 53,808 50,172 48,638 --------------------------------------------------------- Total earnings, as defined $152,770 $214,359 $115,735 $157,352 $170,489 $143,055 ========================================================= Ratio of earnings to fixed charges, 2.37 3.79 2.12 2.92 3.40 2.94 as defined ========================================================= Ratio of earnings to combined fixed charges and preferred dividends, as defined 1.97 3.08 1.81 2.51 2.94 2.59 ========================================================= - ------------------------ (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.