A Manufacturer Has a Monthly Fixed Cost of $45,000 and a Production

Multiple Choice

A manufacturer has a monthly fixed cost of $45,000 and a production cost of $9 for each unit produced. The product sells for $40/unit. What is the cost function? What is the revenue function? What is the profit function?

A) C(x) = 9x + 45,000, R(x) = 40x and P(x) = 31x - 45,000
B) C(x) = 40x + 9, R(x) = 9x and P(x) = -31x + 45,000
C) C(x) = 40x + 45,000, R(x) = 45,000x and P(x) = 31x - 45,000
D) C(x) = 9x + 45,000, R(x) = 9x and P(x) = 31x + 45,000
E) C(x) = 9x + 45,000, R(x) = 45,000x and P(x) = 31x + 45,000