Answer: 
36,300 hours 
Explanation: 
For computing the estimated direct labor hours first we need to find out the manufacturing overhead applied and predetermined overhead applied which is shown below:- 
Manufacturing overhead applied = Actual Overhead + Over applied Overhead 
= $990,000 + $65,600 
= $1,055,600 
and 
Predetermined overhead rate = Manufacturing overhead applied ÷ Actual direct labor hours 
= $1,055,600 ÷ 36,400 hours 
= 29 
So, 
Estimated direct labor hours = Estimated total manufacturing Overhead ÷ Predetermined overhead rate 
= $1,052,700 ÷ 29 
= 36,300 hours 
So, for computing the estimated direct labor hours we simply applied the above formula.