The purchasing department buys the quantities of raw materials that are expected to be used in production each month. Raw materiais inventories, therefore, can be ignored. (a) Compute all of the materiais and labor variances. Total materials variance Materials price variance Materials quantity variance Total labor variance Labor price variance Labor quantity variance (b) Compute the total overhead variance. Total overhead variance Curreet Attengt in Proctest Repon Corgonatioh manutactures a singe oldute. The standard cost per unt of product is shown below. The predetermined mantacturing overhesd tate is $1600 per derect isbor bour 1$24.00+151 it was computed tram a manth. The master budget choved total variable costs of 552200 is 500 per hourt and totsi fised overtesd costs of W\$ poo istoon per hour) Actual couts for October in producing 4,300 units were as follom. month faw materils inentorits, therefore canbe imored (i)