C. W. McCall sells a goldplated souvenir mug; McCall expects to sell 2,000 units for $45 each to earn a $25 contribution margin per unit. Janice McCall, president, expects the year's total market to be 25,000 units. For the year just completed, the local college won the national hockey championship, and as a result, the total actual market was 105,000 units. C. W. McCall sold 6,300 units and calculates sales variances using contribution margin.

What is the firm's market size variance?