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 23,000 desk lamps produced annually follows. $ 270,000 Direct materials Direct labor Fabricating department (6,000 DLH $27 per DLH) Assembly department (16,400 DLH * $25 per DLH) Machine hours Fabricating department Assembly department $162,000 $410,000 14,500 MH 20,900 MH Expected overhead cost and related data for the two production departments follow. Direct labor hours Machine hours Overhead cost Fabricating 170,000 DLH 154,000 MH $420,000 Assembly 310,000 DLH 129,000 MH $415,000 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 lamps. Required 1 Required 2 Required 3 Required 4 Determine the plantwide overhead rate for Laval using direct labor hours as a base. 0 per direct labor hour Estimated overhead costs Estimated direct labor hours Required 1 Required 2 Required 3 Assume a target income level of 10% of average invested assets. Compute residual income for each department. Which department generated the most residual income for the company? Investment Center Electronics Sporting Goods Net income Target net income Residual income Which department is most efficient at using assets to generate returns for the company?