21+50+15=86公仔箱論壇& g( k* R/ T* h6 _) h
why 86...7 ], K9 z# x# f* F6 J
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇" Y" a/ ~7 G4 i, N+ v K$ B
then he giv bck his fren 50% U d% H# o: R- ^* Q" j
and the shoes cost is 15TVBNOW 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。1 i( \, r4 k% X% V
公仔箱論壇 Z5 I# n6 b4 u! J; a
so total he loss is 86...( I3 e$ G- k! s0 n Y, G S
tvb now,tvbnow,bttvb* Z4 j( r+ r' X
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |