21+50+15=86; w1 ^4 O) G/ h2 b4 R
why 86...
. r& l8 |+ m7 H: q8 Y0 ktvb now,tvbnow,bttvbbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21& E7 e+ p, {, t. {9 A/ n* l
then he giv bck his fren 50
+ n( H) I6 o) ~and the shoes cost is 15
& @5 v7 Y" T: M5.39.217.76tvb now,tvbnow,bttvb0 c0 L4 @ s3 D* i% h1 Z
so total he loss is 86...公仔箱論壇( j8 N2 h- Q. Q' e+ c
tvb now,tvbnow,bttvb# @/ p. [" k6 S# Y) E4 c$ U9 H
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |