The following materials standards have been established for a particular product: Standard quantity per unit of output... Standard price...... 8.3 grams $19.15 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......... 7.500 grams $141,375 7.100 grams 700 units What is the materials price variance for the month? Select one: O a. $2,250 F O b. $7,540 U O c. $24,317 U d. $7,660 U