21+50+15=86
8 s3 k. ~- [8 T& x: @# xwhy 86...
. V1 w0 y1 Y/ n4 t$ }* n2 i$ ?becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 217 z% g- J0 B. P
then he giv bck his fren 50
- K$ f, Q, U: D+ Q* x1 {2 \0 oand the shoes cost is 15公仔箱論壇) V) E; q5 l$ o
2 x, O9 @: X& I+ d6 T8 O7 j h公仔箱論壇so total he loss is 86...5.39.217.76/ w# ^; q% E3 ]8 v1 U4 F( {
* x" b9 o3 u" r7 ~& [) R
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |