21+50+15=86www2.tvboxnow.com$ J) y7 i" j! A: I* H: f
why 86...tvb now,tvbnow,bttvb9 h, [6 u+ g' |; j1 H! ]
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
9 i. e7 a) @" A k! Q. O. s7 Qtvb now,tvbnow,bttvbthen he giv bck his fren 500 K ~1 f3 b0 a( ]% e
and the shoes cost is 15公仔箱論壇" Y# C, n* G/ w0 i
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。+ M) Y$ e; E! @+ [8 ~$ ?- M3 D# ?( D
so total he loss is 86...
7 h. M) j1 @: I2 V9 d
, G& o( K4 S% \[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |