21+50+15=86tvb now,tvbnow,bttvb0 }) T7 o" o: p% R! Y
why 86...公仔箱論壇( U+ B4 m3 V) ?. A( q& B7 ?
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21- M$ k' ]; Z# d& K% i1 N. U
then he giv bck his fren 50
+ H& M, y- Z: Q* N" N; o! H" Fand the shoes cost is 15
2 j' m8 M2 ~: _+ TTVBNOW 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。
# ] X+ f. y, A$ k4 iso total he loss is 86...
* d* t& A6 n% R- Dwww1.tvboxnow.com6 d+ ~$ R2 ^ S( k
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |