21+50+15=86tvb now,tvbnow,bttvb8 k: B8 [3 c+ e
why 86...
( X$ L$ ]& H' V% ]) c, nbecos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
6 t' N, ?' G! [# O( d9 H7 Uthen he giv bck his fren 50
& g4 }3 Z L& \2 L$ uand the shoes cost is 15
) ^) V! r& T% z' C6 E! CTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。9 C6 H% S% ^9 \. {8 P* [2 h7 K2 E
so total he loss is 86...
8 j7 b9 U# S) |& Mtvb now,tvbnow,bttvb5.39.217.77:88986 L6 q6 r; i: K4 r* j% B# \
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |