The following materials standards have been established for a particular product:

Standard quanity per unit of output.... 8.3 grams

Standaed price...$19.15 per gram

The following data pertain to operations concerning the product for the last month:

Actual materials purchased.... 7,500 grams

Actual cost of materials purchased...$141,375

Actual materials used in production... 7,100 grams

Actual output....700 units

What is the materials price variance for the month?

$2,250 F

$7,540 U

$24,317 U

$7,660 U