How do you calculate 2b and 3b?

Direct materials Direct labor Variable manufacturing overhead Pixed manufacturing overhead Pixed selling expense Fixed administrative expense Sales commissions Variable administrative expense Cost per Unit 7.40 4.40 $ 1.90 $5.40 3.90 2.90 1.40 0.90 Required: 1. Assume the cost object is units of production: a. What is the total direct manufacturing cost incurred to make 15,500 units? b. What is the total indirect manufacturing cost incurred to make 15,500 units? 2. Assume the cost object is the Manufacturing Department and that its totaf output is 15,500 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? 3. Assume the cost object is the company's various sales representatives. Furthermore, assume that the company spent $44,950 of its total fixed selling expense on advertising and the remainder of the total fixed selling expense comprised the fixed portion of the company's sales representatives' compensation. a. When the company sells 15,500 units, what is the total direct selling expense that can be readily traced to individual sales representatives? b. When the company sells 15,500 units, what is the total indirect selling expense that cannot be readily traced to individual sales representatives