21+50+15=86公仔箱論壇4 {, k6 x3 b$ _4 E
why 86...公仔箱論壇: l" y) ^, `: Y; A9 e
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
% E' \- `% p) j公仔箱論壇then he giv bck his fren 505.39.217.76$ G) u6 H# ~2 w: U. k6 B2 S+ ]
and the shoes cost is 15
e( |$ V+ o2 S: T5 E: Y$ |# h8 X6 h公仔箱論壇
, T# W+ s q! H: S! |" @so total he loss is 86...
2 g: E I: E( h9 x5 e! m/ ]
) ?$ X+ E; `; c3 V1 L公仔箱論壇[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |