21+50+15=86
/ }( C7 G# x" N$ f. ]5.39.217.76why 86...5.39.217.76$ G) m u7 E& P" e6 i& t# h
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
; b' C2 X1 S( s0 h( j; w+ uthen he giv bck his fren 505.39.217.760 g1 B; ]# o6 \* Y0 w$ n3 L
and the shoes cost is 155.39.217.76( A/ s/ Q5 t5 N, U) E/ p, F
公仔箱論壇# _1 N; y( |0 E8 F
so total he loss is 86...
9 T' ^7 m7 N- D& g" D5.39.217.76
' _% i; F& C% P[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |