Exercise 17-9 (algo) allocating overhead using plantwide rate and departmental rates lo p1, p2 laval produces lighting fixtures. budgeted information for its two production departments follows. the departments use machine hours (mh) and direct labor hours (dlh). fabricatingassembly overhead cost$ 1,512,000 $ 264,000 direct labor hours311,200dlh44,000dlh machine hours84,000mh80,500mh laval reports the following for one of its products, a desk lamp. number of unitsfabricating departmentassembly department direct labor hours per unitmachine hours per unitdirect labor hours per unitmachine hours per unit desk lamp4,0003dlh per unit2mh per unit1dlh per unit0.4mh per unit required: 1. determine the plantwide overhead rate using 355,200 direct labor hours as the allocation base. 2. determine the overhead cost per unit for the 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. determine the overhead cost per unit for the desk lamp using the departmental overhead rates.