Answer:
Predetermined overhead rate=$9
Applier overhead=$454,500
Step-by-step explanation:
The predetermined overhead rate shall be determined on the basis of the estimated labour hours and shall be calculated using the following formula:
Predetermined overhead rate=estimated overhead cost/estimated hours
 =450,000/50,000 
 =$9 per hour
Applier overhead=Predetermined overhead rate*Direct labour hours
 =9*50,500
  =$454,500