21+50+15=86
9 a/ y& D9 g3 U1 r$ ?* H2 Gtvb now,tvbnow,bttvbwhy 86...公仔箱論壇5 A* I6 |& x$ t. u( g4 `* M
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 213 [1 k( w/ t6 P4 I% f5 T( o" t" c2 q
then he giv bck his fren 50
) d; {0 l8 Z* ?4 }; Ptvb now,tvbnow,bttvband the shoes cost is 15+ m e; G/ M$ V* y# a' Y) e
www3.tvboxnow.com4 ?$ @# C4 _4 M: v2 I& V
so total he loss is 86...
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# p5 u% I) p! l2 A3 s6 E[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |