"Centives decided to take a look at the mark-up on the toppings for a pizza. This isn’t an easy thing to do since it’s not clear how much of a topping is actually on a pizza. However pizza joints such as Dominos do publish nutritional information for their pizzas. Using the amount of calories in a topping Centives estimated how much of that topping was on the pizza. We then figured out how much it would cost you to buy the same topping and just put it on top of a basic cheese Pizza yourself."