21+50+15=86
. f9 \. j, Z) G" f4 r( kwhy 86...TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。0 A( n. c; s/ X+ V& b
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
2 v4 @; ?7 }& O" \, ftvb now,tvbnow,bttvbthen he giv bck his fren 509 B5 D9 q6 f/ P4 o
and the shoes cost is 15
0 |6 |$ G* Y& u' u9 C7 L& Qtvboxnow.com公仔箱論壇0 |. T. B/ y' ^, l' v
so total he loss is 86...
6 j9 N1 v9 s4 w" l1 wtvb now,tvbnow,bttvb
3 A: E7 `0 \* e; }8 m9 |! u% @tvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |