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 46 units of input at $ 8.00 Beta 92 units of input at $10.50 The company had the following results in June. Units of output produced 2,300 units Materials purchased and used Alpha 113,800 units at $ 7.50 Beta 203,600 units at $11.10 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 Total Materials price variance Materials officiency variance