21+50+15=86
# b' `" v( h# F: g. e5.39.217.76why 86...公仔箱論壇' U4 x+ {4 b. p" J* L' ]
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
/ p/ d: N7 e3 L' L& uthen he giv bck his fren 50
$ J H; c$ U. X4 y, M4 Uand the shoes cost is 15
7 F3 k% ^" b9 W0 b( e h+ |
9 c7 O3 ~" q5 O# S B+ \TVBNOW 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... S$ L6 `; L4 R& F& H; l- V
5 F% Z! m4 S) ]: G' _
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |