Summary: Restaurant meals cost a lot more than meals you make at home—you know this. But what you might not realize is those add-ons, like that oh-so-delicious guac on your burrito, can be some of the most costly offenders. Long gone are the days where adding cheese to your burger cost 50 cents. Now it cost you about three times as much. As the data-crunching folks at Priceonomics explain, most restaurant add-ons tack on an additional $1 to $3, depending on the item.
