E 4 nces Landen Corporation uses a job-order costing system. At the beginning of the year, the company made the following estimates: Direct labor-hours required to support estimated production Machine-hours required to support estimated production Fixed manufacturing overhead cost Variable manufacturing overhead cost per direct. labor-hour 130,000 65,000 $364,000 $ 4.00 Variable manufacturing overhead cost per machine- $ 8.00 hour During the year, Job 550 was started and completed. The following information is available with respect to this job: Direct materials Direct labor cost Direct labor- hours Machine-hours $253 $349 15 5 Required: 1. Assume that Landen has historically used a plantwide predetermined overhead rate with direct labor- hours as the allocation base. Under this approach: a. Compute the plantwide predetermined overhead rate. b. Compute the total manufacturing cost of Job 550.