Calculator Ruby Company produces a chair that requires 4 yards of material per unit. The standard price of one yard of material is $8.80. During the month, 7,500 chairs were manufactured, using 30,300 yards at a cost of $9.24 per yard. Enter favorable variances as negative numbers. (a) Determine the price variance. (b) Determine the quantity variance. Favorable (c) Determine the cost variance. Unfavorable