Ruby Company produces a chair for which the standard specifies 5 yards of material per unit. The standard price of one yard of material is $10.70. During the month, 6,500 chairs were manufactured, using 32,200 yards at a cost of $10.06 per yard. Determine the following: Enter favorable variances as negative numbers. a. Direct materials price variance 21,574 b. Direct materials quantity variance C. Total direct materials cost variance