Exercise 17-10 Assigning overhead costs using the plantwide rate and departmental rate methods LO P1, P2 Laval produces lamps and home lighting foxtures. Its most popular product is a brushed aluminum desk lamp. This lamp is made from components shaped in the fabricating department and assembled in the assembly department. Information related to the 23,000 desk lamps produced annually follows. Expected overhead cost and related data for the two production departments follow. Required 1. Determine the plantwide overhead rate for Laval using direct labor hours as a base. 2. Determine the total manufacturing cost per unit for the aluminum desk lamp using the plantwide overhead rate. 3. Compute departmental overheod rates based on mechine hours in the fabricating department and direct labor hours in the assembly department. 4. Use depactmental overhead rates from requirement 3 to determine the total manufacturing cost per unit for the aluminum desk lamps. Use departmental overhead rates from requirement 3 to determine the total manufacturing cost per unit for the aluminum desk lamps