Landen Corporation uses job-order costing. At the beginning of the year, it made the following estimates:

Direct labor-hours required to support estimated production 140,000
Machine-hours required to support estimated production 70,000
Fixed manufacturing overhead cost $ 784,000
Variable manufacturing overhead cost per direct labor-hour $ 2.00
Variable manufacturing overhead cost per machine-hour $ 4.00
During the year, Job 550 was started and completed. The following information pertains to this job:

Direct materials $ 175
Direct labor cost $ 225
Direct labor-hours 15
Machine-hours 5
Required:
Assume Landen has historically used a plantwide predetermined overhead rate with direct labor-hours as the allocation base. Under this approach:
Compute the plantwide predetermined overhead rate.
Compute the total manufacturing cost of Job 550.
If Landen uses a markup percentage of 200% of its total manufacturing cost, what selling price would it establish for Job 550?
Assume Landen’s controller believes that machine-hours is a better allocation base than direct labor-hours. Under this approach:
Compute the plantwide predetermined overhead rate.
Compute the total manufacturing cost of Job 550.
If Landen uses a markup percentage of 200% of its total manufacturing cost, what selling price would it establish for Job 550?