The standard cost of Product B manufactured by Sheridan Compary includes 3.5 units of direct materials at $5.10 per unit. During June 27,300 units of direct materials are purchased at a cost of $4.90 per unit, and 27,300 units of direct materials are used to produce 7.700 units of Product B. (a) Compute the total materials variance and the price and quantity variances. (b) Compute the total materialsvariance and the prike and quantity variancei aisuming the purchase price is 55.15 and the quantisy purchased and used is 26,700 units