Rogen Corporation manufactures a single product. The standard cost per unit of product is shown below. Direct materials-1 pound plastic at $7.00 per pound $7.00 Direct labor-1.5 hours at $11.10 per hour 16.65 Variable manufacturing overhead 11.25 Fixed manufacturing overhead 6.75 Total standard cost per unit $41.65 The predetermined manufacturing overhead rate is $12.00 per direct labor hour ($18.00 + 1.5). It was computed from a master manufacturing overhead budget based on normal production of 8,850 direct labor hours (5,900 units) for the month. The master budget showed total variable costs of $66,375 ($7.50 per hour) and total fixed overhead costs of $39,825 ($4.50 per hour). Actual costs for October in producing 4,700 units were as follows. Direct materials (4,890 pounds) $35,208 Direct labor (6,900 hours) 78.660 Variable overhead 62,602 Fixed overhead 24,098 Total manufacturing costs $200,568 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. (a) Compute all of the materials and labor variances. 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. (a) Compute all of the materials 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 $