21+50+15=86
# M, g; D! g) Y9 q1 Twhy 86...
9 i; z3 A2 p# K0 _, }becos he change 50 "small money" then giv bck to customer 29 and he keep the balance 21
: W5 ], Z" p3 P @0 y公仔箱論壇then he giv bck his fren 50
; X. u+ [3 A2 V$ n, Iand 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。- x" i+ `) k* e+ Y. M! |/ E
^' n" K, _& t3 ^, y公仔箱論壇so total he loss is 86... P1 e% G3 X- v% F" H( ^
) J' j" r; d3 y7 k9 o: ^0 ntvb now,tvbnow,bttvb[ 本帖最後由 ooichse 於 2008-12-3 01:54 AM 編輯 ] |