21+50+15=86
& G9 B3 ~9 ~9 D5 O" l; Qtvb now,tvbnow,bttvbwhy 86...tvb now,tvbnow,bttvb! g2 \7 Q" C$ E+ S* h8 W
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇; [" i. Z9 [2 J% C& G& o5 [& m
then he giv bck his fren 502 ^8 ^) P0 p* X+ S3 Q) o
and the shoes cost is 15公仔箱論壇5 V6 N( X8 y1 g. x# Y2 J
# V- O7 B# a7 H/ m( R2 j
so total he loss is 86...
4 l/ V Z1 [; V5 |; r' ?5.39.217.77:8898
/ D# P3 p0 G8 S7 ]; |' ^[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |