The Russell Company provides the following standard cost data per unit of product: Direct material (3 gallons @ $3 per gallon) $ 9.00 Direct labor (2 hours @ $13 per hour) $ 26.00 During the period, the company produced and sold 23,000 units, incurring the following costs: Direct material 72,000 gallons @ $ 2.90 per gallon Direct labor 46,500 hours @ $ 12.75 per hour The direct labor usage variance was: