21+50+15=86
& G* C# X$ W6 I0 D/ D: r8 f: wwhy 86...公仔箱論壇3 G+ D8 l+ g0 B( h$ `
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21TVBNOW 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。/ a! K6 a% g0 A/ s
then he giv bck his fren 50
' c3 a6 e4 j9 Z; _! O/ Band the shoes cost is 15tvb now,tvbnow,bttvb9 S" {: K0 j( b$ n$ e+ q1 O' e
公仔箱論壇, [9 n! K0 z0 s0 w* z
so total he loss is 86...公仔箱論壇$ J# f5 b0 }5 c+ S: n" Q
* M! a% P- i+ Y5 @# N, ^8 M[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |