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 June 30, 1992 1993 1994 1995 1996 1997 Fixed charges, as defined: Total Interest 64,066 55,359 52,764 51,635 48,007 47,313 Interest applicable to rentals 521 1,264 1,716 2,173 2,165 2,227 -------------------------------------------------------------- Total fixed charges, as defined 64,587 56,623 54,480 53,808 50,172 49,540 Preferred dividends, as defined (a) 12,823 12,990 9,447 9,004 7,720 6,976 -------------------------------------------------------------- Combined fixed charges and preferred dividends, $77,410 $69,613 $63,927 $62,812 $57,892 $56,516 as defined ============================================================== Earnings as defined: Net Income $65,036 $101,743 $48,779 $68,667 $79,210 64,218 Add: Provision for income taxes: Total income taxes 23,147 55,993 12,476 34,877 41,107 31,481 Fixed charges as above 64,587 56,623 54,480 53,808 50,172 49,540 -------------------------------------------------------------- Total earnings, as defined $152,770 $214,359 $115,735 $157,352 $170,489 $145,239 =============================================================== Ratio of earnings to fixed charges, as defined 2.37 3.79 2.12 2.92 3.40 2.93 =============================================================== Ratio of earnings to combined fixed charges and preferred dividends, as defined 1.97 3.08 1.81 2.51 2.94 2.57 =============================================================== - ------------------------ (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.