A man was sitting on his couch when his wife came home with many shopping bags. She said "I saved us alot of money." "You saved us MONEY?" he retorted
"Yes" She said "These items where 75% off and those were 65% off these I don't know what they are but they where 50% off and this was the best deal of all I bought one and got one free."
the man laughed and said "Of course you got one free those are a pair of shoes.