The following standards have been established for a raw material used to make product O84: Tine runswiny weva perain to a recent montrs operations: set os The direct materials purchases variance is computed whon the materials are purchased Required: a. What is the materials price variance for the month? b. What is the materials cuantify variance for the month? (Indicate the effect of each variance by selecting "F" for favorable, " U " for unfavorable, and "None" for no effect (Le., zero variance), Input all amounts as positive values.)