Answer:
1. Budgeted manufacturing overhead rate = Budgeted manufacturing overhead costs / Budgeted machine-hours
Budgeted manufacturing overhead rate = $3,800,000 / 200,000
Budgeted manufacturing overhead rate = $19
2. The manufacturing overhead allocated during 2017 = Actual machine-hours * Budgeted manufacturing overhead rate
Manufacturing overhead allocated = 196,000 * $19
Manufacturing overhead allocated =$3,724,000
3. Manufacturing overhead costs over-allocated = Manufacturing overhead allocated during 2017 - Actual manufacturing overhead costs
Manufacturing overhead costs over-allocated = $3,724,000 - $3,660,000
Manufacturing overhead costs over-allocated = $64,000