Pizza+Problem

=Pizza Problem= Napolitano's needs your help. They are trying to come up with a chart to keep track of their pizza orders. They offer 2 kinds of Crust: Sicilian and Regular. They offer 4 toppings: Peppers, Pepperoni, Mushrooms, Sausage. Each topping can be ordered on the whole pizza, or on 1/2 of a pizza. You can also order a plain cheese pizza, or get 1/2 of your pizza with just cheese.

How many different pizza combinations are there? Prove that you have accounted for all possible combinations.

Post your explanations below.