Two students decide to go to Jerry's for a pizza. When they get there they find Jerry's is having a special. SPECIAL TODAY one 20" pizza $15 REGULAR PRICE one 10" pizza $5 one 20" pizza $18 Raphael goes: "Great! Let's get a large one." Donatello goes: Don't be dumb. Let's get three of the small ones for the same price. That'll give us more pizza and be cheaper." Raphael goes: "Why would it be a special if it's more than we could get for the regular price? Let's get the large." Who's right? Which would you buy? What would the difference be if you were buying them at Ledo's (square pizzas)? Be sure to explain your answers.