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strictly regulated. Therefore, Hart Labs must constantly monitor and control its testing costs. Shown below are the standard costs for a typical test. Direct materials (2 test tubes @ $1.90 per tube) Direct labor (1 hour $31 per hour) Variable overhead (1 hour$6.00 per hour) Fixed overhead (1 hour$12.00 per hour) 3.80 31.00 6.00 12.00 $52.00 Total standard cost per test The lab does not maintain an inventory of test tubes. As a result, the tubes purchased each month are used that month. Actual activity for the month of November 2020, when 1,100 tests were conducted, resulted in the following Direct materials (2,310 test tubes) Direct labor (1,133 hours) Fixed overhead Monthly budgeted fixed overhead is $15,840. Revenues for the month were $72,600, and selling and administrative expenses were $4,800 4,158 33,990 6,534 12,309 Compute the price and quantity variances for direct materials and direct labor Labor price variance Compute the total overhead variance