21+50+15=86" r- g2 v9 |' z- n1 B. J( f
why 86...tvb now,tvbnow,bttvb6 P. N/ z, P9 g: g. I
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb" m# ~# s* C: D) V$ Y6 Y
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。; o5 q* p+ @ q
and the shoes cost is 15
( M4 A( V3 N$ S' {* O F公仔箱論壇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。$ l% o! {; d) |5 K: n4 V7 q
so total he loss is 86...
/ a) u4 V" n2 D公仔箱論壇
# `4 |$ a. S, l' {% L/ H: f5 Xtvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |