According to reasearchers at the University of Wisconsin-Madison, you aren't saving anything at all. In fact, what seems like a bargain because you're getting so much more food for only a few cents extra, will cost you a lot more in the long run. They crunch the numbers.
Researchers used information from fast-food chains, and estimated the average "upsize" costs a fast-food diner only 67 cents more. That 67 cents buys an average of 400 extra calories. What a bargain, right?
However, for every 100 calories a person eats beyond his daily needs, the costs of additional food to fuel you as a larger person, medical care associated with obesity, and gasoline for transporting heavier people can rise as much as $2. The heavier a person is, the greater the cost.
Your 67 cent savings just cost you $2. Not a lot right now, but it can add up.