Single Plantwide and Multiple Production Department Factory Overhead Rate Methods and Product Cost Distortion Eclipse Motor Company manufactures two types of specialty electric motors, a commercial motor and a residential motor, through two production departments, Assembly and Testing Present the company 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 d The factory overhead was budgeted for Eclipse: sa Assembly Department Testing Department $280,000 800,000 Total $1,050,000 Direct machine hours were estimated as follows 4,000 hours Assembly Department Testing Department 5,000 9.000 hours In addition, the direct machine hours (dm ) used to produce a unit of each product in each departmen Commercial Residential Assembly Department 2.0 dm 3.0 cm Testing Department Total machine hours per unit 8.0 dwth 45 dmh a. Determine the per unit factory overhead allocated to the commercial and residential motors under the single plaside factory overhead rate method, using direct machine Commercial Residential per unit per unit Testing Department 5,000 TONI 9,000 hours In addition, the direct machine hours (dm ) used to produce a unit of each product in each department were determined from engineering records, Commercial Residential Assembly Department 2.0 dmh 3.0 dmh Testing Department 6.0 1.5 Total machine hours per unit 8.0 dmh 4.5 dmh a. Determine the per un factory overhead allocated to the commercial and residential motors unde the single plantwide factory overhead rate method, using direct machine hours as the allocation base. Commercial per unit Residential per unit b. Determine the per unit factory overhead allocated to the commercial and residential motors under the multiple production department factory overhead rate method, wing direct machine hours as the base for each department. Commercial $ per unit Residentials per unit C. Recommend to management a product costing approach, based on your analyses in (a) and (b). 1. The management should consider multiple production department factory overhead rate methods, because this method calculates the cost more accurately and considers the fact that commercial products use more costly overheads than residential products 2. The management should consider single plantwide factory overhead rate methods, because this method calculates the cost more accurately and considers the fact that the overheads are applied evenly based on the direct labor hours. 3. The management could consider either multiple production department factory overhead rate method or the single planwide rate, as both these methods have the same effect on the final costs
