21+50+15=86
7 q7 x# ^! j( d) m公仔箱論壇why 86...tvb now,tvbnow,bttvb9 g5 A5 w* e# M1 g8 V
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215 R' P& C6 z5 i a% w* t# D
then he giv bck his fren 501 ~) e$ o/ g/ V1 s
and the shoes cost is 15
" ^8 d$ q) b7 ~+ q1 b. J$ Q公仔箱論壇
* Z# W0 ?, z6 {5.39.217.76so total he loss is 86...
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[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |