Landen Corporation uses job$-$order costing systemAt the beginning of the yearthe company made the following estimates Direct labor$-$hours required to support estimated production Machinehours required to support estimated production Fixed manufacturing overhead cost Variable manufacturing overhead cost per direct labor$-$hour Variable manufacturing overhead cost per machinehour $65,00032,560195,0001\mathrm{.}2852,48$ During the year Job $550$ was started and completedThe following information is available with respect to this job Direct materials Direct labor cost Direct labor$-$hours Machine$-$hours $250$ Required: Assume that 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 b Compute the total manufacturing cost of Job $550$ Landen uses markup percentage of $200\%$ of its total manufacturing cost, what selling price would it establish for Job $550$ Assume that Landen's controller believes that machine$-$ hours is a better allocation base than direct labor$-$hoursUnder this