Single Plantwide and Multiple Production Department Factory Overhead Rate Methods and Product Cost Distortion Pineapple Motor Company manufactures two types of specialty electric motors, a commercial motor and a residential motor, through two production departments, Assembly and Testing. Presently, the company uses a single plantwide factory overhead rate for allocating factory overhead to the two products. However, management is considering using the multiple production department factory overhead rate method. The following factory overhead was budgeted for Pineapple: Assembly Department $194,400 Testing Department 734,400 Total $928,800 Direct machine hours were estimated as follows: Assembly Department 3,600 hours Testing Department 7,200 Total 10,800 hours In addition, the direct machine hours (dmh) used to produce a unit of each product in each department were determined from engineering records, as follows: Commercial Residential 0.50 dmh 1.00 dmh Assembly Department Testing Department 1.00 2.00 Total machine hours per unit 1.50 dmh 3.00 dmh a. Determine the per-unit factory overhead allocated to the Commercial and Residential motors under the single plantwide factory overhead rate method, using direct machine hours as the allocation base