A local theater sells admission tickets for $7.50 on Sunday nights. At capacity, the theater holds 80 customers. the function M(c) = 7.5c represents the amount of money the theater takes in on Sunday nights, where c is the number of customers. Select all statements that apply in this scenario.

A The function is discrete
B The function is non-negative
C. The function is continuous
D. The domain is rational numbers
E. The domain is integers
F. The domain is x ≤ 80
G. The domain is x < 80​