Required: 1 Assume that Landen has historically used a plantwide predetermined overhead rate with direct hobor-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 seling price would it egtablish for J0b550 ? 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 persentage of 200 of its total manufacturing cost, what seling 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 oll other onswers to the nearest whole dollar.)