21+50+15=86
" s3 j" C" L5 b) m& \6 Bwhy 86...
9 i4 w- l! O+ x5 I5 r/ ?6 J: [5.39.217.77becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
+ J/ J% g' ^, A3 K, U1 pthen he giv bck his fren 50+ }% l ^" W6 }
and the shoes cost is 15. m; e: [ C* o+ B$ z8 J$ c5 }
tvb now,tvbnow,bttvb" z8 J7 i4 U* k- c3 v. D% i$ N4 b
so total he loss is 86...
: K! Z. B+ D( o! d5.39.217.772 y- h8 l& u1 @. z+ }
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |