21+50+15=86 % ]2 k2 ~ |( {3 E; f! Q+ h$ p. e公仔箱論壇why 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。; m2 h p; Y8 O- f: p0 x; M
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21公仔箱論壇 B% Z! x* t9 e. a/ @7 D
then he giv bck his fren 50 % n' Q) z Z; g8 X/ h/ J- Yand the shoes cost is 153 M1 F- z! X) V/ E
, H3 I2 L9 f3 \) d6 Wso total he loss is 86... 6 @- _2 _( P6 W8 z公仔箱論壇! t. S" w& B; {! r0 j
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ]