Exhibit 12 COMPUTATIONS OF RATIOS OF EARNINGS TO FIXED CHARGES Three months ended December 31 (Dollars in thousands) 1999 1998 - ------------------------------------------------------------------------------- Income before taxes $180,950 $95,128 Add fixed charges: Interest expense 6,154 8,737 Interest factor on rent 4,436 3,577 ------------------------------------- Total fixed charges $10,590 $12,314 ------------------------------------- Earnings before fixed charges and taxes on income $191,540 $107,442 ===================================== Ratio of earnings to fixed charges 18.1 8.7