21+50+15=86
+ ]+ V3 e) ^( G Q8 C, J5 X( z- X) ]公仔箱論壇why 86...% ^9 o7 s. W: X. i8 ^' q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
7 u a7 T6 X1 X1 F. S# a* [- H# wthen he giv bck his fren 50
/ g% T* T0 [1 \) n7 ?( Q公仔箱論壇and the shoes cost is 15. t S( I. \4 p/ T: \4 B0 R J
4 e, t( G( V1 [$ A& lso total he loss is 86...5.39.217.769 W3 o9 s" p# S( I
9 C3 ]) A p, k公仔箱論壇[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |