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 Hachine-hours required to support estimated production Fixed manufacturing overhead cost Variable manufacturing overhead cost per direct labor-hour Variable manufacturing overhead cost per machine-hour 80,000 40,000 $240,000 $1.80 $ 3.60 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 207 S 257 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 C. If Landen uses a markup percentage of 200% of its total manufacturing cost, what selling price would it establish for Job 550? 2. Assume that Landen's controller believes that machine-hours is a better allocation base than direct labor-hours. Under this approach