21+50+15=86
& X% p* S' f# A3 t& Q5.39.217.76why 86...公仔箱論壇" j, Y. p0 K, N, d
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
1 o# I$ u5 L. d0 m0 @. t" DTVBNOW 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。then he giv bck his fren 50
. Y T2 X) { r4 P0 ^+ _公仔箱論壇and the shoes cost is 15公仔箱論壇. p0 H$ } e0 s$ g- w* [0 r
8 k& U5 G' Z! K# ~% iso total he loss is 86...
1 b6 S7 p4 A% n+ a, O: m5 M# FTVBNOW 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。" n5 L* B5 j u# Q. C
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |