The following materials standards have been established for a particular product: Standard quantity per unit of output 4.5 pounds Standard price $ 13.30 per pound The following data pertain to operations concerning the product for the last month: Actual materials purchased 4,950 pounds Actual cost of materials purchased $ 62,980 Actual materials used in production 4,450 pounds Actual output 710 units The direct materials purchases variance is computed when the materials are purchased. What is the materials quantity variance for the month?