21+50+15=86
1 p; [9 D1 |% v) k5.39.217.77:8898why 86...* [# G, X. [1 b% p% ^
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb& d- u) T7 h% s* Q' q- v9 \
then he giv bck his fren 50tvb now,tvbnow,bttvb% r+ z5 F1 w3 U1 c! _, h4 D
and the shoes cost is 154 M. m! B" T" z6 M8 g" x
) m* |9 Y+ y8 b& J1 [so total he loss is 86...
, O- c" L5 m6 U q/ B7 F公仔箱論壇1 W5 r4 I2 Q6 i9 F0 @. s5 q* y5 O8 _
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |
發表於 2008-12-3 01:46 AM
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