The profit equation for a coffee shop is P(n) = –5n2 + 60n – 100, where n is the number of customers, in tens of thousands (10000), and P(n) is the profit, in thousands of dollars (1000).
a. What is the profit if the shop has no customers?

b. How many customers must visit the shop for it to break-even?

c. How many customers need to visit for the shop to have its maximum profit and what is the
shop’s maximum profit?