21+50+15=86
. a) q3 H: {5 p1 F- M9 Y3 j" u- O% uwhy 86...* g3 Z8 C% F7 X1 I X$ F
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
# A3 P: l Z& W1 Q( Y/ X( c5 h( d& bthen he giv bck his fren 507 r( I) j9 e$ X) B8 M* c
and the shoes cost is 15
/ _+ Y9 o, N M6 `; B7 G' k) z3 ]tvb now,tvbnow,bttvbtvb now,tvbnow,bttvb" B+ {+ y5 r# g9 J5 s
so total he loss is 86...
. G" m& g) x9 S9 ztvb now,tvbnow,bttvb公仔箱論壇% f5 i& m6 u: B6 B' C
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |