The standard cost of Product B manufactured by Sheffield Company includes 3 units of direct materials at $7.00 per unit. During June, 37,000 units of direct materials are purchased at a cost of $6.70 per unit, and 37,000 units of direct materials are used to produce 12,120 units of Product B. (a) Compute the total materials variance and the price and quantity variances. Total materials variance Materials price variance Materials quantity variance (b) Compute the total materials variance and the price and quantity variances, assuming the purchase price is $7.15 and the quantity purchased and used is 36,200 units. Total materials variance $ Materials price variance $ Materials quantity variance $