The standard cost of Product B manufactured by MIT Company includes 3.80 units of direct materials at $6.30 per unit. During June, 26,700 units of direct materials are purchased at a cost of $6.16 per unit, and 26,700 units of direct materials are used to produce 6,900 units of Product B.

a. Compute the total materials variance and the price and quantity variances.

b. Compute the total materials variance and the price and quantity variances, assuming the purchase price is $6.39 and the quantity purchased and used is 26,800 units.

Do not copy from Chegg and give a complete answer with an explanation