EXHIBIT 11.1 LANDSTAR SYSTEM, INC. AND SUBSIDIARY CALCULATION OF EARNINGS PER COMMON SHARE (In thousands, except per share amounts) (Unaudited) Thirteen Weeks Ended --------------------------- March 31, March 25, 2001 2000 ------------ ------------- Earnings available for earnings per share: Net income $ 8,354 $ 8,339 ============ ============ Average number of common shares outstanding 8,512 9,169 ============ ============ Earnings per common share $ 0.98 $ 0.91 ============ ============ 19