21+50+15=86& {* @. D3 S& G2 }5 U; A- D% }
why 86...
) j* `/ q; N; a% v# \- ubecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb# h/ F5 O# _+ Y; \0 t8 K
then he giv bck his fren 50, D1 U3 n* W6 G6 K0 Q
and the shoes cost is 15tvb now,tvbnow,bttvb) u0 ^! r( q/ X" b5 l! y) T- ?
7 k) ^6 S* z" e6 A# etvb now,tvbnow,bttvbso total he loss is 86...
) I8 k5 L6 A+ s+ G% c6 J: }1 H公仔箱論壇
* H( y% {/ l8 X- L$ I# Ywww2.tvboxnow.com[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |