21+50+15=86 + j+ } `' d7 S3 i1 owhy 86...5.39.217.77 c9 @" W5 n* q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215.39.217.77& S1 t2 \: k# J. f1 C" L. z
then he giv bck his fren 501 F; ^$ u0 Y% j
and the shoes cost is 15 ! w e7 g8 W1 c1 B公仔箱論壇 7 m3 ~5 e& C! T' n! Y3 kso total he loss is 86...TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1 k/ k' o$ g; X7 a4 Y2 |; b
) s+ z3 {$ {2 \+ y
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ]