Proctor Cleaning Products manufactures a product using a process that allows for substitution between two materials, X-1 and Y-7. The company has the following direct materials data for its product: Standard costs for one unit of output X-1 Y-7 68 units of input at $1.00 12 units of input at $4.60 The following results were reported for January: Units of output produced Materials purchased X-1 Y-7 18,200 units 1,204,000 units at $1.02 224,000 units at $4.55 Proctor has a policy of holding no inventories of any kind. 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. Note: 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. X-1 Y-7 Materials price variance Materials efficiency variance < Required A Required B > Total