The following materials standards have been established for a particular product: Standard quantity 4.6pounds per unit of output Standard price $ 13.4per pound The following data pertain to operations concerning the product for the last month: Actual materials purchased 5100pounds Actual cost of materials $ 63,080 purchased Actual materials used in production 4600pounds Actual output 720units The direct materials purchases variance is computed when the materials are purchased. What is the materials quantity variance for the month? $6184U $17.259 U O $15,931 $6700 U