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

During the year, Job $550$ was started and completed. The following information pertains to this job:

Required:

Assume 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 $550?$

Assume 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 $550?$