21+50+15=86TVBNOW 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。+ w$ |8 y( h% z5 Q- C, Q9 P# t
why 86...4 t. Q3 D7 b" u0 ~- X9 c- Q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
# i0 F/ T" B3 H8 b5 i2 N公仔箱論壇then he giv bck his fren 50
! n+ Q7 F9 E( \: E+ Oand the shoes cost is 15
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so total he loss is 86...tvb now,tvbnow,bttvb& U7 |7 ?/ D [4 x3 u
公仔箱論壇& W/ ^' E9 w8 [, a* k
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |