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 125,000 machine-hours required to support estimated production 62,500 fixed manufacturing overhead cost $ 350,000 variable manufacturing overhead cost per direct labor-hour $ 3.80 variable manufacturing overhead cost per machine-hour $ 7.60 during the year, job 550 was started and completed. the following information is available with respect to this job: direct materials $ 201 direct labor cost $ 240 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?