21+50+15=86
% k( d" O, v5 Y' w! Ewhy 86...8 l2 F0 ]: T) x3 s2 Q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
% N3 K5 S; l" M2 ~4 _" P公仔箱論壇then he giv bck his fren 50tvb now,tvbnow,bttvb& i( t8 _4 a1 g# @$ l8 j
and the shoes cost is 15
- W1 l0 |6 @4 |4 n9 o) w1 X5.39.217.77:88988 [4 z# J+ p( R7 }( q& |7 q: }* g
so total he loss is 86...
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7 p K8 A, O8 f3 e$ e[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |