21+50+15=86
# i7 x$ |- U. }5.39.217.76why 86...5.39.217.76 W7 e( p( d& s9 o: Q8 G! R4 `/ ~
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21. }. J! V/ h% c/ h* A3 P: A
then he giv bck his fren 50
8 n* }& f8 \; g( d# vtvb now,tvbnow,bttvband the shoes cost is 15
3 ^( g# k' l3 m+ X# i2 e( \
2 N1 \& S: p2 \ xtvb now,tvbnow,bttvbso total he loss is 86...
8 e* a- r7 V$ p9 K8 y' ~tvb now,tvbnow,bttvb5.39.217.769 y- M4 Z. e5 w0 e5 g
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |