7 23. EX.23.144.ALGO (Algorithmic) Ruby Company produces a chair for which the standard specifies 7 yards of material per unit. The standard price of one yard of material is $14.70. During the month, 7,500 chairs were manufactured, using 52,000 yards at a cost of $13.82 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 $ $