21+50+15=86
& z7 V* h" s& j0 c: `/ M( Awhy 86...8 b: m1 l8 U# W n2 Q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 218 y* M$ I! ~) n
then he giv bck his fren 50
. A1 ^3 C, n1 `: `, s2 G5.39.217.77:8898and the shoes cost is 15
- Z7 b! T8 C; N6 X+ d8 {( v, aTVBNOW 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7 n$ Y5 A. H8 i# u, O2 J# d4 j: }! s
so total he loss is 86...
$ V W9 S& i2 |" h1 T/ w6 }7 l& i1 r6 l6 q
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |