The standard cost of Product B manufactured by Vaughn Company includes 3 units of direct materials at $3.00 per unit. During June, 28,600 units of direct materials are purchased at a cost of $2.70 per unit, and 28,600 units of direct materials are used to produce 9,320 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 $3.15 and the quantity purchased and used is 27,800 units. Total materials variance $ Materials price variance $ Materials quantity variance $