Twitter Company manufactures a remote control device for home theaters. The following data were from the operating period just completed:

Actual market size (units) 25,666 Budgeted market size (units) 24,666 Actual market share 23% Budgeted market share 26% Budgeted selling price per unit $ 71 Actual selling price per unit $ 66 Budgeted variable cost per unit $ 25 Actual variable cost per unit $ 13 What is the firm's market size variance