a. Determine the per-unit factory overhead allocated to the gasoline and diesel engines under the single plantwide factory overhead rate method, using direct labor hours as the activity base. GasolineengineDieselengine$Jperunitperunit Gasoline engine J per unit Diesel engine $ per unit c. Recommend to management a product costing approach, based on your analyses in (a) and (b). Management should select the factory overhead rate method of allocating overhead costs. The factory overhead rate method indicates that both products have the same factory overhead per unit. Each product uses the direct labor hours . Thus, the ? rate method avoids the cost distortions by accounting for the overhead