21+50+15=86
+ I2 n3 k% H( L. q3 p) ], dwhy 86...
+ G5 O, o8 i: e9 g公仔箱論壇becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21" ?- Y9 }4 B+ a4 X
then he giv bck his fren 50
: X6 M+ N! f: @( Jand the shoes cost is 15tvb now,tvbnow,bttvb4 Q' p! l, C1 _8 i, H
5 S+ A( j4 _8 K/ u/ o2 b
so total he loss is 86...tvb now,tvbnow,bttvb4 a7 |9 X" q* r
/ a# z& M5 _/ ?( i& U7 _ [公仔箱論壇[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |