The following materials standards have been established for a particular product: Standard quantity per unit of output 1.7 meters Standard price $19.80 per meter The following data pertain to operations concerning the product for the last month: Actual materials purchased 5, 800 meters Actual cost of materials purchased $113, 680 Actual materials used in production 5, 100 meters Actual output 3, 200 units What is the materials quantity variance for the month? $13, 720 U $6, 732 F $13, 860 U $6, 664 F