The standards for one case of Summer Soda are: Direct materials Direct labor Variable overhead (based on machine hours) 8 lbs. @ $ 3.50/1b. 4 hrs. @ $15.00/hr. 2 hrs. @ $ 5.00/hr. During the week ended May 10, the following activity actually took place: 2,700 cases of finished product were actually produced; 21,330 lbs. of raw material were used; 22,600 lbs. of raw material were purchased for inventory at a cost of $3.70/1b; 10,650 labor hours were worked at an average rate of $15.20 per hour; 5,740 machine hours were worked; $27,552 actual variable overhead costs were incurred, or $4.80/machine hour. Calculate each of the following variances (formulas are given): (a.) Price variance for raw materials purchased. (SP-AP) x AQ purchased (b.) Raw materials usage variance. (SQ-AQ) x SP (c.) Direct labor rate variance. (SP-AP) x AQ (d.) Direct labor efficiency variance. (SQ-AQ) x SP (e.) Variable overhead spending variance. (SP-AP) x AQ (f.) Variable overhead efficiency variance. (SQ-AQ)x SP