How much did owner lose?

Question

A guy walks into a store and steals a $100 bill from the register with out 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?

Answer 1

He still lost $100.

 

The $70 purchase is irrelevant.  It amounts to exchanging stolen cash for goods that were not paid for, so the owner gets nothing back from the $70 "purchase."  Had he not given back $30 in change, he would be out by $70.  At the end he is still out by $100.