EXERCISE 2-9 Job-Order Costing and Decision Making ( LO2-1, 9 LO2-2, (9) LO2-3 a plantside predetermined crethead rate busd on machine hoars. At the bepinning of the year, the contparg inade the foliowing estimates: Roquired: LCompute the plantwide predetermined overhead rate. respect to this job: Compute the total manufacturing cos asiened to Jos P90 b. Coostrust an argumet (accoenpanied ty oumerical anabus) that suppoets the chief financtat offcris anerioe