Beta Company has a manufacturing facility in Northland that manufactures special equipment for the auto industry. Beta collected the following information from its main production line for year 2021: Actual quantity purchased Actual quantity used Units standard quantity Actual price paid Standard price 200 units 110 units 100 units $ 8 per unit $ 10 per unit Beta isolates price variances at the time of purchase. The materials price variance for 2021 is a. $400 favourable. b. $400 unfavourable. C. $220 favourable. d. $220 unfavourable.