A firm plans to sell 1,000 units of its only product at a price of $20 per unit. It had variable manufacturing costs of $8 per unit and fixed manufacturing costs of $2 per unit. SGA costs included $ 3 per unit (variable) and $1 per unit (fixed). Actual sales were 1,250 units. What is the value for the sales volume variance? Enter favorable variances as positive numbers and unfavorable variances as negative numbers.