21+50+15=86
( s7 ~5 u& L4 Y4 swhy 86...
9 v8 X$ ^' T5 ^& ]1 T5 C5.39.217.77becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇3 Y- Y# p# b& t% B5 u, i
then he giv bck his fren 50
; j% [# n. j0 W- U7 h. D5.39.217.77and the shoes cost is 155.39.217.77# Z! F* D P/ A
3 n" o: d( {8 ~" r' P0 y$ {. E$ nso total he loss is 86...
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/ F7 I3 l% A' vtvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |