what is the materials proce variance

Preble Company manufactures one product. Its variable manufacturing overhead is applied to production based on direct labor-hours and its standard cost card per unit is as follows: The planning budget for March was based on producing and selling 21,000 units. However, during March the company actually produced and sold 24,000 units and incurred the following costs: a. Purchased 150,000 pounds of rain materials at a cost of $6.40 per pound. All of this material was used in production. b. Direct laborers worked 66,000 hours at a rate of $18 per hour. c. Total variable manufacturing overhead for the month was $413,820. If Preble had purchased 181,000 pounds of materiais at $6.40 per pound and used 150,000 pounds in production, what would be he materials price variance for March? (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and None" for no effect (i.e., zero variance.). Input all amounts as positive values.)