 Money news at 10 and 40 past the hour. Here's Dan Ronan. As we head into the Fourth of July holiday, a report from Wells Fargo and their Agricultural Food Institute takes a look at the cost of a backyard barbecue with friends and family compared to the cost of going to a restaurant. Home cooking is a lot less expensive. For example, the cost of a home-grilled hamburger is a little more than $2 a burger. But if you went to a moderately priced restaurant, it would cost you $6.