Product A has a contribution margin per unit of $500 and required 2 hours of machine time. Product B has a contribution margin per unit of $1,000 and requires 5 hours of machine time. How much of each product should be produced given there are 100 hours of available machine time?

a. 50 units of A and 25 units of B

b. 25 unit of B

c. 50 units of A

d. None of the above