21+50+15=86
* \' n+ }9 d! O2 }, Cwhy 86..., ^0 H% K5 K" x9 u) f+ A1 x
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb; u5 \: z" E8 B3 u$ v8 J* y2 [
then he giv bck his fren 50
: A l4 e7 ?( K0 r( Y5 A, r公仔箱論壇and the shoes cost is 15
" a- X; N; J5 MTVBNOW 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。公仔箱論壇5 p6 ?( z' k% |6 Z, l
so total he loss is 86...5.39.217.77:8898$ G" t8 g7 @) R
* y" X& ?3 o/ v9 S+ x: o F$ i[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |