Kubin Company's relevant range of production is 27,000 to 29,000 units. When it produces and sells 28,000 units, its average costs per unit are as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Fixed selling expense Fixed administrative expense Sales commissions Variable administrative expense Average Cost per Unit $ 8.70 $ 5.70 $ 3.20 $ 6.70 $ 5.20 $ 4.20 $ 2.70 $ 2.20 Required: 1. Assume the cost object is units of production: a. What is the total direct manufacturing cost incurred to make 28,000 units? b. What is the total indirect manufacturing cost incurred to make 28,000 units? 2. Assume the cost object is the Manufacturing Department and that its total output is 28,000 units a. How much total manufacturing cost is directly traceable to the Manufacturing Department? b. How much total manufacturing cost is an indirect cost that cannot be easily traced to the Manufacturing Department?