 The cost of your July 4th burger is going up again this year. More from USDA economist Megan Switzer. Prices for our four ounces of ground beef rose by five cents. Prices for our two ounce slice of tomato rose by one cent. And then our one ounce of cheddar cheese declined by two cents. And prices of bread and lettuce stayed largely the same. Switzer adds that bacon on the burger will cost you an additional three cents from what it did last year.