21+50+15=86
; }: K. a6 a/ i# T5 Dwhy 86...
?5 v2 I8 E, j* D; tbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21www.tvboxnow.com1 l" e3 d4 L0 H& W
then he giv bck his fren 50' N6 l- p& ~% l5 N
and the shoes cost is 15
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9 @1 s" j" Z8 tso total he loss is 86...www.tvboxnow.com% d0 h8 w4 z \! ]2 M* a
4 i4 l1 _5 V. f# B[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |