For Denver Company, the per-unit standards for direct materials are 14.1 gallons at $4.70 per gallon. Last month, 12,750 gallons of direct materials that actually cost $57,600 were used to produce 830 units of product. What was Denver company's total materials variance for last month?

A. $2,596 Unfavorable

B. $2,596 Favorable

C. $2,325 Favorable

D. $2,325 Unfavorable