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 March 31, 1991 1992 1993 1994 1995 1996 Fixed charges, as defined: Interest on long-term debt $63,628 $60,709 $52,099 $46,081 $46,241 $46,276 Interest on notes payable 953 36 7 1,348 474 660 Other interest charges 1,444 1,636 1,795 3,581 4,164 3,011 Amortization of expense and premium on debt-net(cr) 1,617 1,685 1,458 1,754 756 668 Interest applicable to rentals 574 521 1,264 1,716 2,173 2,193 ------------------------------------------------------ Total fixed charges, as defined 68,216 64,587 56,623 54,480 53,808 52,808 Preferred dividends, as defined (a) 14,962 12,823 12,990 9,447 9,004 8,540 ------------------------------------------------------ Combined fixed charges and preferred dividends, as defined $83,178 $77,410 $69,613 $63,927 $62,812 $61,348 ====================================================== Earnings as defined: Net Income $63,088 $65,036 $101,743 $48,779 $68,667 $71,817 Add: Provision for income taxes: Federal and State (1,001) 4,463 54,418 46,884 71,651 78,417 Deferred Federal and State - net 32,491 20,430 539 (26,763) (35,224) (37,510) Investment tax credit adjustment - net (1,634) (1,746) 1,036 (7,645) (1,550) (3,431) Fixed charges as above 68,216 64,587 56,623 54,480 53,808 52,808 ------------------------------------------------------- Total earnings, as defined $161,160 $152,770 $214,359 $115,735 $157,352 $162,101 ======================================================= Ratio of earnings to fixed charges, as defined 2.36 2.37 3.79 2.12 2.92 3.07 ======================================================= Ratio of earnings to combined fixed charges and preferred dividends, as defined 1.94 1.97 3.08 1.81 2.51 2.64 ======================================================= - ------------------------ (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.