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 60, 000 Machine-hours required to support estimated production 30, 000 Fixed manufacturing overhead cost $ 180, 000 Variable manufacturing overhead cost per direct labor-hour $ 1.00 Variable manufacturing overhead cost per machine-hour $ 2.00 During the year, Job 550 was started and completed. The following information is available with respect to this job: Direct materials $ 213 Direct labor cost $ 323 Direct labor-hours 15 Machine-hours 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: 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