21+50+15=86% W; N3 q6 Y+ a3 H: M% F0 ]
why 86...
1 F$ e/ A/ r5 ?% B8 q" |公仔箱論壇becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21+ a' e- j* N! B" R! `) ^/ z4 O0 Y
then he giv bck his fren 50
% w5 v+ J+ y4 X5 mand the shoes cost is 15) o+ J4 J8 `5 d0 E' n- Q
/ |8 E$ h" u. \1 W. q, ?公仔箱論壇so total he loss is 86...os.tvboxnow.com: X# p1 O* W( J5 \2 e" N7 Z
& T! G/ r8 a, T3 Ttvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |