a. The Profit Function is R - C = 225X - 75X + 60,0000, if the firm produces 500 units, it will make a profit of $40,000 b. The Profit Function is R - C = 225X - 75X - 60,000, if the firm produces 500 units, it will make a profit of $15,000 c. The Profit Function is R - C = 225X - 75X - 60,000, if the firm produces units, it will make a loss of $45,000 d. The Profit Function is R - C = 225X - 75X - 60,000, if the firm produces units, it will make a profit of $31,000