Stacy, Inc., produces a product using a process that allows for substitution between two materials, Alpha and Beta. The company has the following direct materials data for its product. Standard costs for one unit of output Alpha Beta 24 units of input at 48 units of input at $ 8.00 $16.50 The company had the following results in June. Units of output produced 3,800 units Materials purchased and used Alpha Beta 99,200 units at $ 7.50 174,400 units at $16.80 Required: a. Compute materials price and efficiency variances. b. Compute materials mix and yield variances. Complete this question by entering your answers in the tabs below. Required A Required B Compute materials price and efficiency variances. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) Alpha Beta Materials price variance Materials efficiency variance < Required A Required B > Total