3. The following standards have been established for a raw material used to make product I92: Standard quantity of the material per unit of output.... 6 pounds $2.25 per pound 3 hours $8 per hour Standard hours of labor per unit of output Standard rate of the labor per hour The following data pertain to a recent month's operations: 13,600 pounds 13,600 pounds 2,300 units of product I92 7,100 hours $57,150 Actual labor used Actual total labor cost Required: a. What is the materials price variance for the month? b. What is the materials quantity variance for the month? c. What is the labor rate variance for the month? d. What is the labor efficiencv variance for the month