Kilbourne Appliances produces two models of beverage coolers for homes and offices, the KA-15 and the KA-24. Data on operations and costs for March follow. Required: a. Compute the predetermined overhead rate assuming that Kilbourne Appliances uses direct labor-hours to allocate overhead costs. Note: Round your answer to 2 decimal places. b. Compute the predetermined overhead rate assuming that Kilbourne Appliances uses machine-hours to allocate overhead costs