Laval produces lamps and home lighting fixtures. 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 35,000 desk lamps produced annually follows $225,000 Direct materials Direct labor Fabricating department (6,500 DLH 524 per DLH) Assembly department (16,600 DH X $23 per DLH) Machine hours Fabricating department Assembly department $156,000 $381,820 14,500 MH 20,850 MH Expected overhead cost and related data for the two production departments follow. Direct labor hours Machine hours Overhead cost Fabricating Assembly 150,000 DH 335,000 OH 167,800 MH 221.000 H $330,000 $440,000 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 overhead rates based on machine hours in the fabricating department and direct labor hours in the assembly department 4. Use departmental overhead rates from requirement 3 to determine the total manufacturing cost per unit for the aluminum desk