Markson and Sons leases a copy machine with terms that include a fixed fee each month of $500 plus a charge for each copy made. The company uses the high-low method to analyze costs. If Markson paid $360 for 5,000 copies and $280 for 3,000 copies, how much would Markson pay if it made 7,500 copies? Suppose that a company has fixed costs of $18 per unit and variable costs $9 per unit when 15,000 units are produced. What are the fixed costs per unit when 12,000 units are produced