21+50+15=864 F) I% `- n- `% B9 s
why 86...
L9 Y ^' I: T N, q) v9 U5.39.217.77becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
5 h* @& R, J. e# n5.39.217.77then he giv bck his fren 50tvb now,tvbnow,bttvb3 ]2 g% Z& r/ z5 w
and the shoes cost is 15
( N4 M+ G( ~' o' M# r$ {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。
, D, Q3 n& p( ]- b. r5.39.217.77so total he loss is 86...% {4 C6 P( i* x. M2 O- F3 [9 M
. C E; I$ V$ p* Q" U' J[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |