Zillow Inc. has the following data related to direct materials costs for the current month: actual cost for 7,000 pounds of material at $2.50 per pound and standard cost for 6,700 pounds of material at $3.20 per pound. What is the direct materials cost variance?

A) $3,940 unfavorable

B) -$3,940 favorable

C) $960 unfavorable

D) -$4,900 favorable