Exhibit 12 COMPUTATIONS OF RATIOS OF EARNINGS TO FIXED CHARGES Three months ended December 31 (Dollars in thousands) 1997 1996 - ---------------------------------------------------------------------------- Income before taxes $176,265 $136,984 Add fixed charges: Interest expense 10,747 14,007 Interest factor on rent 2,891 2,092 --------------------------- Total fixed charges $13,638 $16,099 --------------------------- Earnings before fixed charges and taxes on income $189,903 $153,083 =========================== Ratio of earnings to fixed charges 13.9 9.5