21+50+15=86tvb now,tvbnow,bttvb: b& P+ X' N$ ]' P0 G
why 86...3 B2 k+ R8 v5 F" C
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
# `3 L8 o2 ]/ ~2 i' `! e) U' r8 Xthen he giv bck his fren 50tvb now,tvbnow,bttvb# p s) I6 Y* q/ \$ |
and the shoes cost is 15
" u: X$ ]. _$ l( @: I# ~" w公仔箱論壇
( O. }, b7 ^: X) x公仔箱論壇so total he loss is 86...
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( O3 l8 N' a" V2 W. V[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |