Exercise 11-7 Lawn uses a standard costing system. For production of a fuel cell, standards call for 4 model RN-3 valves per cell costing $2,470 each. During 2018, the company purchased 240 valves for $528,000. The company used 240 valves in the production of 58 fuel cells (8 valves were ruined through installation error) Calculate material price and quantity variances for the model RN-3 valves. (Enter all variances as a positive number.) Material Price Variance Material Quantity Variance s Question Attempts: 0 of 3 used