g Determine departmental overhead rates and compute the overhead cost per unit for each product line. Base your overhead assignment for the components department on machine hours. Use welding hours to assign overhead costs to the finishing department. Assign costs to the support department based on number of purchase orders. 2. Determine the total cost per unit for each product line if the direct labor and direct materials costs per unit are $250 for Model 145 and $160 for Model 212.