21+50+15=86
, R6 ^$ ]/ [0 l( e M' L7 Kwhy 86...
# T, F/ C/ c" J4 `9 ~) W5.39.217.76becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
$ A: W. o( q6 @9 C; A" D: l9 f) qthen he giv bck his fren 50
7 |' [! C- E" Y( u/ @2 i* }7 v1 Tand the shoes cost is 15
3 t6 p2 F0 H+ j& Q3 s5.39.217.76
0 y/ ^1 }3 D1 U0 `: {0 T% `! Dso total he loss is 86...& d) s$ A8 l; K s; T% c# n) T
, R9 {7 P6 {) {7 z4 n5 Z
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |