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 Direct labor-1.6 hours at $12.00 per hour Variable manufacturing overhead-1.6 hours at $7.5 Fixed manufacturing overhead-1.6 hours at $2.5 Total standard cost per unit $ 7.00 19.20 12.00 4.00 $42.20 The predetermined manufacturing overhead rate was computed from a master manufacturing overhead budget based on normal production of 8,000 direct labor hours (5,000 units) for the month. Actual costs for October in producing 4,800 units were as follows. Direct materials (5,100 pounds) $ 36,720 Direct labor (7,400 hours) Variable overhead Fixed overhead Total manufacturing costs 92,500 59,700 21,000 $209,920 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. Instructions: 1. Compute the price and quantity variances for direct materials. 2. Compute the rate and efficiency variances for direct labor. 3. Compute the variable overhead spending and efficiency variances. 4. Compute the fixed overhead budget and volume variances.