21+50+15=86
, |2 |; a' J U$ r5.39.217.77:8898why 86...# T& D! J$ L+ ] a1 V
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215.39.217.77:8898, o R% \8 j7 ]. D( ]* P
then he giv bck his fren 50
" |6 d7 B- }' N m! zand the shoes cost is 155.39.217.77:8898 ^2 i# x2 V3 G0 i8 p
! h( C& |" ~5 ]0 F9 g e公仔箱論壇so total he loss is 86...TVBNOW 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。$ J+ b2 b# V! K, ]5 \- |
公仔箱論壇9 f; \) H0 ]* r0 D) E) x/ X% r
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |