21+50+15=86公仔箱論壇) ~1 w3 m6 s0 O: B+ u
why 86...
7 O/ g3 S( A- n9 N: n p6 `becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
( H! A* x# w1 e" Jthen he giv bck his fren 50tvb now,tvbnow,bttvb4 Z' d+ f! I, i% ]
and the shoes cost is 15
' D7 F% F- @! Z! O$ o4 W. z- f5.39.217.76
* t' L" S8 c6 F% x# ^5.39.217.76so total he loss is 86...公仔箱論壇' t2 m7 q5 ?) s1 a- v+ B
& J! { I; I: d
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |