Standard Costing Problem Northern linois Labs provides mad cow disease testing for both state and federal government agricultural agencies. Because the company's customers are governmental agencies, prices are strictly regulated. Therefore, Northern Illinois Labs must constantly monitor and control its testing centers. Shown below is the standard cost card for a typical test. Direct materials (2 test tubes @ $1.46 per tube) Direct labor (1 hour @ $24 per hour) Variable overhead (1 hour @ $6 per hour) $ 2.92 24.00 6.00 Total standard cost per test $32.92 The lab does not maintain an inventory of test tubes. As a result, tubes purchased each month are used that month. Actual activity for the month of November, when 1,475 test were conducted, resulted in the following actual results. Direct materials (3,050 test tubes) Direct labor (1,550 hours) Variable overhead $_4.270 35,650 10,900 1. Compute the price and quantity variances for direct materials. 2. Compute the price and quantity variances for direct labor. 3. Compute the rate and efficiency variances for variable overhead