21+50+15=86公仔箱論壇7 i4 k( z5 X+ Y5 c' v
why 86...公仔箱論壇# i5 T% c8 c N1 y1 x& Q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21 9 h2 j* k; O$ a- fwww2.tvboxnow.comthen he giv bck his fren 50 6 u! b' d9 q4 h' ?- R& t! `www2.tvboxnow.comand the shoes cost is 155 q$ ^. U7 k5 Y5 o2 L5 w
www2.tvboxnow.com- X: I$ {. [; w
so total he loss is 86... ) U V ?. M, x& u# Y" l& A1 I* ?( twww2.tvboxnow.com R- d& i2 V1 @, f
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ]