21+50+15=86
: }' Z" h9 D e% e( P* D; Ywhy 86...公仔箱論壇( b8 r9 \ ^1 ?0 G
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 216 r* W! D' t; r' d2 n) i$ q
then he giv bck his fren 507 _+ ~6 G A0 p, P
and the shoes cost is 15
6 b" M. j* [8 G) h. X4 o/ [5.39.217.773 _6 V2 l7 g5 s5 H {! c# }
so total he loss is 86...* o! {8 W+ q8 @* x6 D7 _3 ^
公仔箱論壇) ]( }2 h' g; O |2 q1 }
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |