21+50+15=867 n- R' P$ u8 k1 n1 [
why 86...公仔箱論壇, k( ]0 B' A0 A s
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21www.tvboxnow.com% t4 C6 U, G8 I5 l
then he giv bck his fren 50
3 F: p1 ~9 i8 B4 Jand the shoes cost is 15公仔箱論壇% z1 y6 X4 @2 L+ D
* |7 L# _3 i. x. g3 r( G7 D公仔箱論壇so total he loss is 86...+ P# q) A0 i. d3 v; v: K
& x# k$ f( _" S1 o* qwww.tvboxnow.com[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |