21+50+15=863 J+ ^( z, e8 v! O6 G1 o
why 86...
: C/ g( M1 }3 {1 z$ C/ ~becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
& e+ X% D' l8 Z' C8 {then he giv bck his fren 50公仔箱論壇( h6 l1 H' ^6 ^3 D, j& G/ y! m
and the shoes cost is 15
3 ]* O# Z3 F# ]0 _+ q, F6 P' |TVBNOW 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。公仔箱論壇' ^- \- M/ S6 C- C
so total he loss is 86...
R8 f' I3 @6 d- b. z, T
/ G- n$ N4 f) X5.39.217.77:8898[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |