21+50+15=862 v F8 L. A4 m+ d6 \7 Y+ w% j, S
why 86...
; Z5 |5 x" S& x! ]" |5.39.217.77becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
, r! ~) c8 y( z- L( @7 ]tvb now,tvbnow,bttvbthen he giv bck his fren 50
) |3 {% _, W# i4 c0 v8 h5.39.217.77and the shoes cost is 15tvb now,tvbnow,bttvb4 P% E2 ]( q# R5 H+ _4 j9 A
tvb now,tvbnow,bttvb& x: A, r# l+ C) _% Q
so total he loss is 86...
3 }" C$ w& j8 V0 p5 ]1 d
( {, e+ R# L- w! h5 F[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |