21+50+15=86公仔箱論壇- o7 {% `( f o7 x9 z
why 86...tvb now,tvbnow,bttvb! T. n {8 E) C, |) U' D1 N: j
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21- g# u1 Q; g1 L- g$ H
then he giv bck his fren 50
u& m' O2 C1 Aand the shoes cost is 15) ^; [8 J! C, |
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so total he loss is 86...
; w$ i) Q' g# H7 a5 R5 ?tvb now,tvbnow,bttvb
) B, h# P0 d, }0 _0 j" q公仔箱論壇[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |