OB Which of these statements is not true about overhead cost allocation: O A Managers can set an appropriate selling price without knowing product cost information When a manufacturer changes from using a single plant-wide overhead allocation rate to multiple rates, the results may better reflect each product's consumption of overhead resources, C. Firms calculate their predetermined overhead rates before the start of an accounting period. Managers would select machine usage as the cost driver for overhead costs in the Production Department if they OD believe that there is a direct relationship between the number of machine hours used and the amount of overhead costs incurred