7. EX.23.144.ALGO Algorithmic) 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 $10.30. During the month, 5,700 chairs were manufactured, using 28,800 yards at a cost of $9.68 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 $