Answer and Explanation:
The computation of the predetermined overhead rate for each department is given below:
For department D
= Estimated manufacturing overhead ÷ direct labor cost
= $1,260,000 ÷ $1,800,000
= 70% of direct labor cost
For department E
= Estimated manufacturing overhead ÷ direct labor hours
= $1,625,000 ÷ 125,000
= $13 per direct labor hours
For department K
= Estimated manufacturing overhead ÷ machine hours
= $960,000 ÷ 120,000
= $8 per machine hours