The following materials standards have been established for a particular product: Standard quantity per unit of output Standard price 5.1 grams $11.95 per gram 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.. What is the materials quantity variance for the month? Select one: 6.800 grams $86.360 6.300 grams 1.000 units O a. $14,340 U 0 b. $5,975 U 0 c. $15,240 U O d. $6,350 U