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 $80,000$

Machine$-$hours required to support estimated production $40,000$

Fixed manufacturing overhead cost $ $240,000$

Variable manufacturing overhead cost per direct labor$-$hour $ $1\mathrm{.}80$

Variable manufacturing overhead cost per machine$-$hour $ $3\mathrm{.}60$

During the year, Job $550$ was started and completed. The following information is available with respect to this job:

Direct materials $ $207$

Direct labor cost $ $257$

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 $550?$

$($Round your intermediate calculations to $2$ decimal places. Round your Predetermined Overhead Rate answers to $2$ decimal places and all other answers to the nearest whole dollar.$)$