21+50+15=86公仔箱論壇4 \9 I) b4 u. X3 T& b
why 86...
$ K' ~8 j! |* b/ m" O5 _) O9 E, ~2 ?becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21/ [- j6 O" C& {) h9 K
then he giv bck his fren 502 n$ m, n# w+ m6 c
and the shoes cost is 15
% D# F! V. h& J) O
, k' H z1 N* k2 d- W1 ^5.39.217.77so total he loss is 86...
, [/ s2 q s* t, ]7 E! F* j& F8 r5.39.217.77; a& v, e: _+ d; ^/ X7 B
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |