21+50+15=86tvb now,tvbnow,bttvb; T- G8 F# H/ {4 g9 o5 R: n
why 86..., _. T7 D! D0 S; D+ \
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb7 `% P h+ m. Y# `; q
then he giv bck his fren 50公仔箱論壇2 ?# q& y8 h; E
and the shoes cost is 15
- O9 _% f t# n2 W
4 a$ u- O, @/ e8 N$ Vwww3.tvboxnow.comso total he loss is 86...公仔箱論壇; W" q! c- @9 j& ^' u, u! G
: r# ?9 c3 T0 o[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |