21+50+15=86
; |! Z8 l# L8 p5 wwhy 86...
4 c! X" g6 R( E7 W, v3 b/ B! w& \0 @becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
- e# f& X3 M! }/ e* Dtvb now,tvbnow,bttvbthen he giv bck his fren 50
$ M% z. _$ w0 S$ u/ E: z0 Oand the shoes cost is 156 U S$ F% T8 E" T) D' {
' D8 s. c, _* _8 ~( M, qTVBNOW 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。so total he loss is 86...
9 g& a. h" b; ]% O公仔箱論壇5.39.217.779 Z: p1 i0 J- m; _* ^% `0 C
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |