21+50+15=86
7 x+ I, E$ ?+ h1 {' ~; i i2 ]why 86...tvb now,tvbnow,bttvb7 k. m! }( g, ?
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 214 P4 p6 G( W" l7 T% S, E
then he giv bck his fren 50
2 w" Y' z0 S8 N; F5 r) I# Uand the shoes cost is 15公仔箱論壇- b/ k* a" r. k1 R; @0 v. f
2 u0 a+ H5 {8 A% M8 k$ n7 Q/ ]so total he loss is 86...公仔箱論壇: N% ^3 E7 i, ~: H
' E9 _ P9 w: e: ~8 Ctvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |