In Problem 56:

a. If the fraternity buys a larger warming oven that has 25 shelves with the same shelf dimensions, for an additional $2,000, how much would they increase profit?

b. If they could increase their budget to $1,500 per game, how much would they increase profit?

c. If they increased the selling price of a hot dog to $4, but it would reduce demand for hot dogs to at most 600, would this result in a greater profit for the fraternity?