21+50+15=86
! @0 D- f3 ]& X$ I& O8 t' \why 86...公仔箱論壇! [6 l, o4 ]( {, @, {0 {# q
becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
, H& g, Q8 c) T( L. Xthen he giv bck his fren 50
+ B G R) V) X- w" d: land the shoes cost is 15TVBNOW 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。, B' n0 X" d; P+ r& N' o
+ S+ d/ P$ N% a w z) `so total he loss is 86...
3 E; b1 T$ ?; c公仔箱論壇
: c6 w7 Q6 {* a, Ftvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |