Doon Company incurred the following costs while producing 480 units direct materials. 511 per unit direct labor, 529 per unit variable manufacturing overhead. 518 per unit total feed manufacturing overhead costs, 57,680 variable selling and administrative costs, S4 per unit, total feed selling and administrative costs, S4320 There are no beginning inventories What is the ending balance in Finished Goods Inventory using variable costing if 440 units are sold? O A. $5,280 OB. $7.920 OC. 52.480 OD. $2,320