Johnson, Inc. is a manufacturer of lead crystal glasses. The standard direct materials quantity is 1.0 pound per glass at a cost of $0.30 per pound. The actual result for one month's production of 6,900 glasses was 1.2 pounds per glass, at a cost of $0.10 per pound. Calculate the direct materials cost variance and the direct materials efficiency variance. Select the formula, then enter the amounts and compute the cost variance for direct materials and identify whether the variance is favorable (F) or unfavorable (U)