An all-you-can-eat buffet attracts two types of customers. Regular customers value the buffet at $20 and eat $5 of food in costs to the restaurant. Hungry customers value the buffet at $40 and eat $10 of food. If there are 100 of each type in the market for a buffet dinner, what is the restaurant’s profit? a. $2,500 b. $3,000 c. $4,500 d. $6,500