The following materials standards have been established for a particular product: Standard quantity per unit of output Standard price 5.8 pounds $14.60 per pound The following data pertain to operations concerning the product for the last month: Actual materials purchased Actual cost of materials purchased Actual materials used in production Actual output 6,900 pounds $64,280 , 400 pounds 840 units The direct materials purchases variance is computed when the materials are purchased. What is the materials quantity variance for the month