21+50+15=86
. w' w( Z$ N1 vtvb now,tvbnow,bttvbwhy 86...
, A: a' m% X. Q% Ybecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215 x- y/ v* I9 b5 W/ K% K) B# Z
then he giv bck his fren 50
0 N# e; M3 I$ ^' [6 l/ dand the shoes cost is 15TVBNOW 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( |2 ?5 D5 {' @' C2 e
8 |% V% z3 y; S, E* ~
so total he loss is 86...
`2 U4 F4 @6 c4 Q( n& stvb now,tvbnow,bttvb公仔箱論壇) x) _+ o+ F% R3 i! D# _: r; ?( d
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |