21+50+15=86# j9 V, n* }$ O' m
why 86...
% x1 X! l' z3 K- Cbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21! f# r! ?. m0 f5 c7 `) M. }) n
then he giv bck his fren 50
) c: k$ O7 V$ X* M公仔箱論壇and the shoes cost is 15' N- I: }! S. z$ r
6 G8 J5 m" g" Z \6 J
so total he loss is 86...公仔箱論壇. R0 o# S* K8 V
/ o0 a. d" w' D6 R3 Y
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |