The Jamaican shoes company produces three other types of shoe sandals for another company. Sandal A sells for $60; its variable costs are $20. Sandal B sells for $200; its variable costs are $120. Sandal C sells for $25; its variable costs are $10. Last year, the firm sold 1000 pairs of A, 2000 pairs of B, and 10,000 pairs of C. The firm has fixed costs of $320,000 per year. Calculate the break-even point of the firm.