21+50+15=86tvb now,tvbnow,bttvb1 A( ^6 y% b" u. s: X7 W- ^; U
why 86...
; w1 ~1 |* [, n" f' }$ i. y7 K+ qbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
6 i2 s7 q7 k5 W6 a. B$ W0 J( ~. ]公仔箱論壇then he giv bck his fren 50
% {; D1 H3 e+ K9 m' htvb now,tvbnow,bttvband the shoes cost is 15TVBNOW 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。- B4 l" {: ]$ d
tvb now,tvbnow,bttvb- j6 M( C; d/ `! \: L) R% R5 y2 Y
so total he loss is 86...
7 d9 b6 a0 O1 S; c7 Ntvb now,tvbnow,bttvb7 [! w2 X/ s) |% x5 P8 c
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |