Arman Corporation's relevant range of activity is 4,140 units to 9,660 units. When it produces and selis 6,900 units, its average costs per unit are as follows: Required: a. If 8,280 units are produced, what is the total amount of fixed manufacturing cost incurred? b. If 8,280 units are produced, what is the total amount of manufacturing overhead cost incurred? What is this total amount expressed on a per unit basis? Note: Round per unit manufacturing overhead cost to 2 decimal places. c. If 5,520 units are produced, what is the total amount of direct manufacturing cost incurred? d. If 5,520 units are produced, what is the total amount of indirect manufacturing cost incurred