21+50+15=86
d4 c4 [" G/ y4 L! [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。why 86...- j4 j. F- I& J k4 `' g! o
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215.39.217.779 P# c9 [# k1 G6 ~' E. ^$ \
then he giv bck his fren 505.39.217.777 Y7 r. @7 x8 ?
and the shoes cost is 155.39.217.77) Y5 r' v& J- W- M d" v
7 @2 c& k z- i
so 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。& I6 W! H# z9 C) k0 l6 _
) } c6 I# C0 qtvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |