21+50+15=86
, M+ H: v$ O. ETVBNOW 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。why 86...5.39.217.76, R1 _. B* f; L, T
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
/ E/ k7 g6 b( F7 sthen he giv bck his fren 50" `$ q5 }; R8 Y7 T
and the shoes cost is 15& B' D) ~0 l% ]1 w8 J; r
5.39.217.76, R3 S- Y' r5 @
so total he loss is 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。6 C. L+ ]$ m9 {3 E2 ~5 w
7 S8 }) `- e3 J5.39.217.76[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |