How smart are you A guy walks into a store and steals a 100

How smart are you? A guy walks into a store and steals a $100 bill from the register without the owners knowledge. He comes back 5 minutes later and buys $70 worth of goods with the $100 bill the owner gives him $30 in change, how much MONEY did the owner lose??? Please don\'t make a fool of yourself...

Answer :

The total loss of the shop owner = $ 100 bill + $ 70 cost of goods + $ 30 in change