21+50+15=86
" g; c P3 s$ Kwhy 86.... s7 [. h* ^7 n# n& p
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 215.39.217.763 B& c, K" _" i# ~% {. [) H3 q; Y* S
then he giv bck his fren 50
2 K% Y8 w' d `. w" \1 zTVBNOW 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。and the shoes cost is 15
% m& I' b! P/ L$ [0 p" `& j% g5.39.217.768 |: b1 Y9 D+ }+ X: w" i! N
so total he loss is 86...
5 d* ?' F2 H2 }; x7 V公仔箱論壇
. X& @0 k% N6 \[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |