Ruby Company produces a chair for which the standard specifies 6 yards of material per unit. The standard price of one yard of material is $10.80. During the month, 5,200 chairs were manufactured, using 30,600 yards at a cost of $10.26 per yard, Determine the following: Enter favorable variances as negative numbers. a. Direct materials price variance b. Direct materials quantity variance c. Total direct materials cost variance Unfavorable Favorable Unfavorable