Riverbed, Inc. manufactures one product called tybos. The company uses a standard cost system and sells each tybo for $8. At the start of monthly production, Riverbed estimated 9,640 tybos would be produced in March. Riverbed has established the following material and labor standards to produce one tybo: Standard Quantity Standard Price Direct materials 2.5 pounds $3 per pound Direct labor 0.6 hours $10 per hour During March 2022, the following activity was recorded by the company relating to the production of tybos: 1. The company produced 9,430 units during the month. 2. A total of 24,360 pounds of materials were purchased at a cost of $66,990. 3. A total of 24,360 pounds of materials were used in production. 4. 5,330 hours of labor were incurred during the month at a total wage cost of $58,630. Calculate the following variances for March for Riverbed, Inc. Identify whether each variance is favorable or unfavorable. (a) Materials Price Variance $select an option selec an option (b) Materials Quantity Variance $select an option selec an option (c) Labor Price Variance $select an option selec an option (d) Labor Quantity Variance $select an option selec an option