21+50+15=86
" D: N4 c' Y5 @) J3 @( t, ?& Cwhy 86...- G$ i( p; X+ _# B6 O0 ]
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
& v9 z. Y* p% J$ O9 u5.39.217.76then he giv bck his fren 50
) V: H& u, o# o+ _5.39.217.76and the shoes cost is 15公仔箱論壇; h1 }+ k+ s1 \+ d
- c/ `1 g! z3 T/ n3 {! Utvb now,tvbnow,bttvbso total he loss is 86...: C; d$ q( A; A7 V5 d
+ p# l" i# `1 k6 s% U! y; M+ o. o- f5.39.217.76[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |