Single Plantwide Factory Overhead Rate Gwinnett County Chrome Company manufactures three chrome-plated products-automobile bumpers, valve covers, and wheels. These products are manufactured in two production departments (Stamping and Plating). The factory overhead for Gwinnett County Chrome is $239,200. The three products consume both machine hours and direct labor hours in the two production departments as follows: Stamping Department Automobile bumpers Direct Labor Hours Machine Hours Valve covers Wheels 590 810 310 570 350 620 1,250 2,000 Plating Department Automobile bumpers 195 1,150 Valve covers 200 700 Wheels 195 750 590 2,600 1,840 4,600 Total Required: 1. Determine the single plantwide factory overhead rate, using each of the following allocation bases: (a) direct labor hours and (b) machine hours.