Would also like clarification on favorable or unfavorable

Ruby Company produces a chair that requires 5 yards of material per unit. The standard price of one yard of material is $7.50. During the month, 3, 400 chairs were manufactured, using 43, 700 yards at 3 cost of $7.30 per yard. Enter favorable variances as negative numbers. Determine the following: a. Price variance $ b. Quantity variance $ c. Cost variance $