eBook 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. 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 Eclipse: Assembly Department Testing Department Total $280,000 800,000 $1,080,000 Direct machine hours were estimated as follows: Assembly Department Testing Department Total 4,000 hours 5,000 9,000 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: