21+50+15=86tvb now,tvbnow,bttvb$ E* Y4 W% T" z! Q! u8 P+ U: A
why 86...
4 L2 k" d3 A. x" y, q2 Pbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
' l% \$ ~% ]6 G5 b% ^3 G$ H" j1 @7 T5.39.217.76then he giv bck his fren 507 T9 o9 V, H% h8 }# z
and the shoes cost is 15
& [1 s1 O9 l6 w( z- V5 w& W/ S! i* S$ @9 x3 n8 q5 ~/ e
so total he loss is 86...
' v/ E* U5 U: C4 T! G9 ^5.39.217.76
0 Q0 P) T; r. Q* d- {' `[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |