Final answer:
The overhead application rate based on direct labor hours is $30 per labor hour.
Step-by-step explanation:
The overhead application rate is calculated by dividing the budgeted overhead by the expected production, and then multiplied by the actual production. In this case, the budgeted overhead is $1,800,000 and the expected production is 60,000 labor hours. Therefore, the overhead application rate based on direct labor hours is $30 per labor hour.