Swamp Rat Pizza has the following cost standards for a large pizza crust Direct materials = 1.50 pounds per unit @ $2.25 per pound Direct labor = 0.75 hours per unit @ $8 per hour Actual production and costs were as follows: Units produced = 8,500 Direct materials used = 13,000 lbs. Direct materials purchased = 15,000 lbs. @ a cost of $36,750 Direct labor incurred = 6,200 hours at a cost of $51,150. The material efficiency variance was: ?