21+50+15=86www2.tvboxnow.com2 a) x7 U$ A" b. T
why 86...& A+ d1 m9 i% p c8 J6 ]# W% ]4 U
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21www2.tvboxnow.com7 b" y+ s8 x, Y' {
then he giv bck his fren 50
* B! G9 X( \: D5 q% ]: ~$ [公仔箱論壇and the shoes cost is 15; T" l+ {5 X. o2 X/ p0 B
0 d4 O2 F. K" q& S8 G; P6 [ }公仔箱論壇so total he loss is 86...公仔箱論壇& O) _7 t/ E) b1 s G% g, o
tvb now,tvbnow,bttvb O- [: H7 r. z+ J' Z6 N! E, h
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |