21+50+15=86
* R2 e* q8 t. Z7 N0 D: a% k Dwhy 86...# S6 q- J" a+ B% e9 q) O1 U
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
: N7 T1 L( w7 j: [5 rtvb now,tvbnow,bttvbthen 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。% A) o" q# U% H8 [: A
and the shoes cost is 15
! V8 N1 S, e4 @' l O; `tvb now,tvbnow,bttvb! Y6 ]8 |! x% }* Y! y4 R
so total he loss is 86...公仔箱論壇0 n5 @% F7 W0 y
tvb now,tvbnow,bttvb l6 p7 N4 I: l9 t0 B! T; _; i
[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |