21+50+15=86# }, R( e% [) K! L( k! R
why 86...
) [% h/ ~: T1 D! t# s/ bbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇# k5 p# H/ L% {# p
then he giv bck his fren 50
! @0 G7 m/ b/ P, {1 X+ y5 w. _tvb now,tvbnow,bttvband the shoes cost is 15
4 C) e- y: |( Atvb now,tvbnow,bttvb
& }& K p, `. M8 F% j, _) Wso total he loss is 86...2 D9 J2 P0 q& o, s/ }
, { n7 b( q, g+ v5 u0 ?公仔箱論壇[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |