21+50+15=86
+ n6 x. U0 P% e/ o$ f( `) ywhy 86...5.39.217.767 W9 m! K# n. q2 o6 V
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇( c0 ^4 n+ z) y7 p& O9 Q
then he giv bck his fren 50# z$ j7 {- E, Q+ w
and the shoes cost is 15
7 y* a- |6 `3 }% {0 d7 B; D: M, {公仔箱論壇
& f. }" h# e* y. ?( p* g8 hso total he loss is 86...公仔箱論壇+ }+ G5 x! ]4 g! [
8 K7 p G+ ^; rTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。[ 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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