Aloe Labs performs steroid testing services to high schools, colleges, and universities. Because the company deals solely with educational institutions, the price of each test is strictly regulated. Therefore, the costs incurred must be carefully monitored and controlled. Shown below are the standard costs for a typical test. Direct materials (2 petrie dish @ $2.5 per dish) Direct labor (0.3 hours @ $15 per hour) V ariable overhead (0.3 hours @ $8 per hour) Fixed overhead (0.3 hours @ $5 per hour) Total standard cost per test $ 5.00 4.50 2.40 1.50 $13.40 The lab does not maintain an inventory of petrie dishes. Therefore, the dishes purchased each month are used that month. Actual activity for the month of July 2024, when 2,250 tests were conducted, resulted in the following. Direct materials (2,540 dishes) $ 12,255 Direct labor (1,240 hours) 11,457 V ariable overhead 5,750 Fixed overhead 2,250 Instructions (a) Compute the price and quantity variances for direct materials and direct labor. (b) Compute the total overhead variance