EXHIBIT 11.1 LANDSTAR SYSTEM, INC. AND SUBSIDIARY CALCULATION OF EARNINGS PER COMMON SHARE (In thousands, except per share amounts) (Unaudited) Twenty Six Thirteen Weeks Ended Weeks Ended --------------------------- --------------------------- June 24, June 26, June 24, June 26, 2000 1999 2000 1999 ------------ ------------- ------------- ----------- Earnings available for earnings per share: Net income $ 17,776 $ 18,230 $ 9,437 $ 10,755 ============ ============ ============ ============ Average number of common shares outstanding 9,024 10,246 8,880 10,125 ============ ============ ============ ============ Earnings per common share $ 1.97 $ 1.78 $ 1.06 $ 1.06 ============ ============ ============ ============ 20