21+50+15=869 r/ r* B7 U. ]3 x
why 86... - j: R+ I2 a' `公仔箱論壇becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21 9 H6 ~5 o( f) gthen he giv bck his fren 50* N0 ?5 ]4 R- Y: L
and the shoes cost is 15 / j2 p* [4 D N6 ]5 Q. ] A5.39.217.76 3 I2 ]" o- j$ I# o( r: O公仔箱論壇so total he loss is 86...TVBNOW 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。* c$ F4 _+ F1 M. U
公仔箱論壇3 y- }" W* o8 | {) F! d
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ]