i just need help finding the materials quantity variance. i am not sure how to use b to use in the equation to find materials quantity variance. Thank you!

unit of Zoom are given below: Direct materials Direct labor Standard Quantity or Hours 4.6 pounds 0.2 hours Standard Price Or Rate $ 2.50 per pound $18.00 per hour Standard Cost $11.50 $ 3.60 During the most recent month, the following activity was recorded: a. Twenty thousand pounds of material were purchased at a cost of $2.35 per pound. b. The company produced only 3,000 units, using 14,750 pounds of material. (The rest of the material purchased remained in raw materials inventory) c.750 hours of direct labor time were recorded at a total labor cost of $14,925. Required: Compute the materials price and quantity variances for the month. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect fi.e., zero variance). Input all amounts as positive values.) Answer is complete but not entirely correct. Materials price variance Materials quantity variance $3,000F $ 15,500