21+50+15=86
8 S' r* w" Z8 A& `) L1 h$ \why 86.... R7 P$ v- j+ M/ g+ e
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 219 ?9 z* \/ {) J' P
then he giv bck his fren 50
' r% D. E: i! }- h% v0 o& ~& H ~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。and the shoes cost is 155.39.217.76# D: {' s% U' ]
! \! t& z) _8 ^so total he loss is 86...5.39.217.76$ j+ ^; W, v7 M. z
. T U" O5 n% B/ l( v& b[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |