E17.9 (LO2,3), AP Air United, Inc. manufactures two products: missile range instruments and space pressure gauges. During April, 50 range instruments and 300 pressure gauges were produced,and overhead costs of $94,500 were estimated. An analysis of estimated overhead costs reveals the following activities. The cost driver volume for each product was as follows. Instructions a. Determine the overhead rate for each activity. b. Assign the manufacturing overhead costs for April to the two products using activity-based costing