Pfizer allocates its manufacturing overhead based on direct labor hours. The following data is available:

Cost Pool	Budgeted Overhead	Direct Labor Hours
Assembly Department	$500,000	20,000
Packaging Department	$300,000	15,000
Quality Control	$200,000	10,000

The actual data for the period is:

Department	Actual Overhead	Actual Direct Labor Hours
Assembly	$480,000	18,000
Packaging	$310,000	14,000
Quality Control	$220,000	9,000

Requirements:

1. Calculate the predetermined overhead rate for each department.
2. Determine the overhead applied to each department.
3. Compute the overhead variance for each department.
4. Analyze the reasons for any significant variances.