Scram Inc. estimates their manufacturing overhead based on the pounds of direct materials used. In the current year, the predetermined overhead rate is \$1.50 per pound of direct material used. The month end journal entry to record the production activity included the following:
|Work in Process||\$45,000|
|Manufacturing Overhead Control||\$45,000|
Actual overhead was $42,500. What was the amount of materials used during the month?