21+50+15=86
% ~1 F" h# z/ P2 q9 fwhy 86...
+ Z1 b5 X$ F5 Mbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
* A6 X& ?' n8 G+ q. ~* b) ]5.39.217.77then he giv bck his fren 50公仔箱論壇( `0 M+ F. g7 r( f
and the shoes cost is 15
! {6 O) p1 `% l) gtvb now,tvbnow,bttvb
5 t& S9 ?, M( D- uTVBNOW 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。so total he loss is 86...
6 I4 ^; w6 _/ ~+ @tvb now,tvbnow,bttvb* v* D$ M5 C4 j3 x/ h g7 C( s
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |