A manufacturing company has fixed costs of $120,000 per month and variable costs of $6 per unit. Determine the profit for each of these scenarios.
a. produce and sell 100,000 units at $8 each
b. produce and sell 100,000 units at $10 each
c. produce and sell 200,000 units at $8 each
d. produce and sell 200,000 units at $10 each