re: Help with riddle - How Much Money Did The Store Lose?

This person steals $100 in cash from the store. The store is -$100. This person then gets $70 worth of goods and uses the $100 to pay for the goods. This person gives the $100 in cash and is given the $30 in change.

How much did the store pay for the goods? let's say $40 and they were selling them for $70. So what they lost was the $30 they gave back in change plus what they paid for the items.