21+50+15=86& ^; s( K3 O, m' z8 z9 I/ j
why 86...
. U' k. G# S# t/ k5.39.217.76becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvb now,tvbnow,bttvb' \3 e% } _; F7 D! o
then he giv bck his fren 50tvb now,tvbnow,bttvb, C- F- U( L6 N( f: x+ q% }
and the shoes cost is 15) Z- s, E; p/ O$ \1 V
- ?: {- A9 f" N& V& NTVBNOW 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。so total he loss is 86...公仔箱論壇" S R* ]" q8 Z
5.39.217.769 S& A* v5 q0 T9 C
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |