21+50+15=86tvb now,tvbnow,bttvb4 P5 h; d+ L9 T( V1 ]7 d6 J0 `
why 86...- @9 F( Z0 B& I2 O s; j2 O
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 219 x# Q, u1 p& @& \. Q% V
then he giv bck his fren 50. U s- b3 k; T6 F
and the shoes cost is 15
3 H2 c0 Z" d: ^% V* Y" E+ JTVBNOW 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。
. F. f$ \( ]7 r# u% `+ t公仔箱論壇so total he loss is 86...tvb now,tvbnow,bttvb3 |( x7 f8 e1 m0 ^* t
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。+ z1 S( C* }: o& H% S4 u
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |