A firm produces three products. Product A sells for $60; its variable costs are $20. Product B sells for $200; its variable costs are $120. Product C sells for $25; its variable costs are $10. Last year, the firm sold 1000 units of A, 2000 units of B, and 10,000 units of C. The firm has fixed costs of $320,000 per year. Calculate the break-even point of the firm (excel solution showing formulas used)