21+50+15=86
5 l6 @, v6 v' Q0 g2 K4 w& G) @9 T nTVBNOW 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...9 h) v6 a9 g9 ~6 P' T
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
. t9 b4 b) `' C9 }1 L5.39.217.77then he giv bck his fren 50公仔箱論壇 v: z( ^; a" \! l G( X+ O! t
and the shoes cost is 15
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so total he loss is 86...5.39.217.77( N5 I0 l# a! Y6 ?: ]" i
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[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |