s23-6 Calculating materials variances Martin, Inc. is a manufacturer of lead crystal glasses. The standard direct materials quantity is 1.0 pound per glass at a cost of $0.50 per pound. The actual result for one month's production of 6,500 glasses was 1.2 pounds per glass, at a cost of $0.30 per pound. Calculate the direct materials cost variance and the direct materials effciency variance. S23-7 Calculating labor variances Martin, Inc. manufactures lead crystal glasses. The standard direct labor time is 0.5 hours per glass, at a cost of $18 per hour. The actual results for one month's production of 6,500 glasses were 0.2 hours per glass, at a cost of $11 per hour. Calculate the direct labor cost variance and the direct labor efficiency variance