Problem 26-01A Rogen Corporation manufactures a single product. The standard cost per unit of product is shown below. Direct materials 1 pound plastic at $6.00 per pound Direct labor-2.5 hours at $12.10 per hour Variable manufacturing overhead Fixed manufacturing overhead Total standard cost per unit S 6.00 30.25 18.75 21.25 576.25 The predetermined manufacturing overhead rate is $16.00 per direct labor hour 540 00 2.5 It was computed rrom a master manufacturing ove head budget based on normal production or 12,750 direct labor hours 5,100 units for the month. The master budget showed total variable costs of $95.625 57.50 per hour and total fixed overhead costs o 108,375 $8.50 per hour Actual costs for October in producing 3,600 units were as follows. Direct materials (3,760 pounds) Direct labor (8,870 hours) Variable overhead Fixed owerhead 22,936 109,101 103,678 42,422 $278,137 Total manufacturing costs 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. Compute all of the materials and labor variances