21+50+15=86( b8 r2 D6 \0 m. v# O! E7 F
why 86...
8 J& s$ W U) K4 lTVBNOW 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。becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇* x2 P1 ?$ l! s/ b% C
then he giv bck his fren 50
+ a3 f; j2 e7 u2 H1 g, L公仔箱論壇and the shoes cost is 15
) x( Q9 W0 m, C+ c! K" Y. Q4 ? r0 g7 T* ~
so total he loss is 86...5.39.217.77:8898$ G, J0 A1 ?7 w( c! _7 O8 C
5.39.217.77:8898- x9 o J6 F3 d" B( i
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |