21+50+15=86
6 Y2 u' h ]* k: Y! z公仔箱論壇why 86...tvb now,tvbnow,bttvb' V+ d% G3 @$ W) e5 k. J
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21* ?, b' y0 x0 `# o
then he giv bck his fren 50TVBNOW 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。* J4 r6 I$ O |4 n7 z4 B( k
and the shoes cost is 15
/ O) b& L' `& O- J3 dtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb: u' n/ f8 e' v1 F
so total he loss is 86...
1 K- @3 `4 |$ J; m7 ]! B公仔箱論壇
/ m. p8 Z4 V0 P+ G, h[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |