The standard amount of materials required to make one unit of Product Q is 4 pounds. The Luisas Ravioli Company static budget showed a planned production of 3,800 dozen of ravioli. During the period, the company actually produced 4,100 dozen of ravioli. The actual amount of materials used averaged 3.9 pounds per dozen. The standard price of material is $1 per pound. Based on this information, the materials usage variance was:

a. $410 favorable.b. $380 favorable c. $380 unfavorable d $410 unfavorable.