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 hol (MH) and direct labor hours (DLH). Laval reports the following for one of its products, a desk lamp. Required: 1. Determine the plantwide overhead rate using 186,250 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