A) Direct labor hrs for car wheels = estimated wheels *direct labor per wheel
40,000 *1hr = 40,000
Direct labor hrs for Truck
10,000 * 3hr= 30,000
total direct labor hrs 40,000+30,000 = 70,000 hrs
Overhead rate is total est oh cost/ total direct labor hrs
770,000/70,000= 11.00
B) Car truck wheels 40,000*11 =440,000
Truck wheels 10,000*11=110,000