21+50+15=86, O, A2 l$ [% r$ k5 Q7 J# j( R
why 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。) W& K% G$ g: F6 w
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21, L5 w7 L/ X9 Q8 ~7 ^/ Q# k' i
then he giv bck his fren 50公仔箱論壇, D* _$ N$ P1 K+ O! b" U/ }6 S
and the shoes cost is 15
( X3 U( \5 f0 ^" s7 G0 P5.39.217.77
. B1 R9 n5 n. {1 }1 BTVBNOW 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...
! y! o f& M3 R5.39.217.77tvb now,tvbnow,bttvb# E- X( W/ h# F" s/ N
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |