How much of the "cost" of a product is because of "shoplifting"?

Lets say 5% of the store is stolen a month. That's several stores in a year. 5% per month is 60% a year. The product costs several times more than what they pay for it for. Some of that is the stores profits and some of it is the wholesale price of the product. I think it's pretty safe to assume some of that is because of shoplifting.