A firm produces products X, Y and Z with contribution margins of $10, $5 and $4 respectively. The firm has only 5000 machine hours available for a particular period. Machine hours required for each of the products are 5, 1 and 1 hours respectively. Demand for the products is 1000 for X, 2500 for Y and 2000 for Z. How many units of each product should the firm produce to maximise profits?

Select one:

a.1000 X

b.5000 Y

c.2500 Y and 2000 Z

d.100 X, 2500 Y and 2000 Z

e.500 X, 2500 Y and 2000 Z