21+50+15=86
6 x, h6 A0 X; r/ I, L# R9 u1 E4 G5.39.217.77why 86...
, ~, J* V( c$ V9 B/ `! P# Pbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
7 v. w Y/ C* K0 O) a5.39.217.77then he giv bck his fren 50
, G5 s/ n5 b# h( x7 v o* Vand the shoes cost is 15
6 H8 }% a' _; @0 i% m* ~tvb now,tvbnow,bttvb* N' N" V6 V \! |( y: G1 i) u# o' W
so total he loss is 86...
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[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |