Milltown Company specializes in selling used cars. During the month, the dealership sold 21 cars at an average price of $14,900 each. The budget for the month was to sell 19 cars at an average price of $15,900. Compute the dealership's sales volume variance for the month.

$10,800 F

$21,000 U

$21,000 F

$31,800 U

$31,800 F