Father Dominics Pizza Company receives 30 calls per hour for delivery of pizza. It costs Father Dominics $10 to send out a truck to deliver pizzas. It is estimated that each minute a customer spends waiting for a pizza costs the company 20 in lost future business.

(a) How often should Father Dominics send out a truck?

(b) How would your answer to (a) change if a truck could only carry five pizzas?