Blue Ridge Marketing Inc. manufactures two products, A and B. Presently, the company uses a single plantwide factory overhead rate for allocating overhead to products. However, management is considering moving to a multiple department rate system for allocating overhead. The following table presents information about estimated overhead and direct labor hours. Line Item Description Overhead Direct Labor Hours (dlh) Product A Product B Painting Dept. $248,000 10,000 dlh 16 dlh 4 dlh Finishing Dept. 72,000 10,000 4 16 Totals $320,000 20,000 dlh 20 dlh 20 dlh The factory overhead allocated per unit of Product B in the Painting Department if Blue Ridge Marketing Inc. uses the multiple production department factory overhead rate method is a. $4