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 Variable manufacturing overhead cost per machine-hour 160,000 80,000 $ 480,000 $ 5.00 $ 10.00 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 Required: $ 240 $233 15 5 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?