21+50+15=86
8 s$ E3 h" P+ z/ O* P6 jwhy 86...
' ^1 M' f& F! s9 K4 ]tvb now,tvbnow,bttvbbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb( S+ t! n' t; v( [6 R: H0 L9 k: l
then he giv bck his fren 50
5 w) P6 u- S/ s0 yTVBNOW 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。and the shoes cost is 15tvb now,tvbnow,bttvb9 e* g3 G3 B# z; O( O `" u6 h4 ?9 z( I9 m
7 T. h# ]5 A! j$ O公仔箱論壇so total he loss is 86...www2.tvboxnow.com7 H$ |! ]% E- x. B
5 q# I# R9 i& W' E, |" ?( o[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |