Product Decisions Under Bottlenecked Operations Mill Metals Inc. has three grades of metal product, Type 5, Type 10, and Type 20. Financial data for the three grades are as follows: Mill's operations require all three grades to be melted in a furnace before being formed. The furnace runs 24 hours a day, 7 days a week, and is a production bottleneck. The furnace hours required per unit of each product are as follows: The Marketing Department is considering a new marketing and sales campaign. Determining the unit contribution margin per furnace hour will assist in making your decision. Round the unit contribution margin to two decimal places. Which product should be emphasized in the marketing and sales campaign in order to maximize profitability