(Use this information to answer questions 18 to 22): A company produces two products made from aluminum and copper. The table below gives the unit require ments, the unit production man-hours required, the unit profit and the availability of the resources (in tons). Aluminum Copper Man-Hours Unit Profit Product 1 1 0 2 50 Product 2 1 1 3 60 Available 10 6 24 22. (5 points) One unit of aluminum cost $10. Suppose the price of aluminum were to increase. What is the most the company should be willing to pay for extra aluminum? (a) 10 (6) 20 (c) 30 (d) 40