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, Gasoline engine per unit Diesel engine per unit b. Determine the per-unit factory overhead allocated to the gasoline and diesel engines under the multiple production department factory overhead rate method, using direct labor hours as the activity base for each department. Gasoline engine per unit Diesel engine X per unit c. Recommend to management a product costing approach, based on your analyses in (a) and (b). 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, Gasoline engine per unit Diesel engine per unit b. Determine the per-unit factory overhead allocated to the gasoline and diesel engines under the multiple production department factory overhead rate method, using direct labor hours as the activity base for each department. Gasoline engine per unit Diesel engine X per unit c. Recommend to management a product costing approach, based on your analyses in (a) and (b)