21+50+15=86tvb now,tvbnow,bttvb. J* {& t' w- F O- p: i6 K
why 86...公仔箱論壇" V8 O" }) G7 Z" v+ [0 [8 Z& b
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb ?9 ^8 K3 d9 m! d/ H
then he giv bck his fren 50
3 J/ u( ]- z i$ z% K. M! M公仔箱論壇and the shoes cost is 15tvb now,tvbnow,bttvb" o. x! B. ?* ?; j* J0 E1 z) P& F
& u8 B! ]5 \2 W' p* I公仔箱論壇so total he loss is 86...
# e% B: [7 ]$ \8 Pwww1.tvboxnow.com
+ ]5 t6 |5 h9 C; c1 @; S) htvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |