21+50+15=86tvb now,tvbnow,bttvb4 s+ P B9 ^9 K# k6 Z
why 86...tvb now,tvbnow,bttvb, n3 U& A, J$ b; O1 n% h
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21tvboxnow.com% A% [" c3 t+ q& b, f
then he giv bck his fren 50TVBNOW 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。) T. r$ n, x. y" \) Y' i. T0 y
and the shoes cost is 15
" z5 Y- P+ R1 T9 v, J: m* J- ?2 K: {% x; b8 c
so total he loss is 86...1 j! p* N% O/ K6 D1 C4 F
; C$ D+ C) C; z) h0 X. rtvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |