Book Costello Corporation manufactures a single product. The standard cost per unit of product is shown below. PLU $ 19.17 12.00 Direct materials-3 pound plastic at $6.39 per pound Direct labor-1.00 hours at $12.00 per hour Variable manufacturing overhead Fixed manufacturing overhead Total standard cost per unit $43.17 URCES The predetermined manufacturing overhead rate is $12 per direct labor hour($12.00 = 100). It was computed from a master manufacturing overhead budget based on normal production of 5.200 direct labor hours (5.200 units) for the month. The master budget showed total variable costs of $33.800 ($6.50 per hour) and total fixed overhead costs of $28,600 (55.50 per hour). Actual costs for October in producing 4,300 units were as follows. part Direct materials (13.100 pounds) Direct labor (4.110 hours) $ 86,067 50,923 Variable overhead Fixed overhead 36,170 17.400 Total manufacturing costs $190.560 The purchasing department buys the quantities of raw materials that are expected to be used in production each month. Raw materials inventories, therefore, can be ignored. v Study (a) Compute all of the materials and labor variances. (Round answers to o decimal places, e.. 125.) Total materials variance Materials price variance Materials quantity variance Total labor variance Labor price variance Labor quantity van once