21+50+15=86公仔箱論壇" M( ^9 Z, d! f' K, N" V1 l- d$ f
why 86...5.39.217.77. N# ^* X9 I! E+ a" b9 q) X! F
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
; W ^' V+ b( @公仔箱論壇then he giv bck his fren 50
' f0 I& M8 o5 @+ E5 @2 V. Sand the shoes cost is 15& ~& r5 M* G4 D: p& R
' {3 t% l) s3 S: K8 @% T6 g' T5.39.217.77so total he loss is 86...5.39.217.77' G. E, m" S, q9 w2 e& A" A' ~
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[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |