A firm sells two products. Product X sells for $12; its variable cost is $4. Product Y sells for $25; its variable cost is $15. Product X accounts for 45 percent of the firm's sales, while Y accounts for 55 percent. The firm's fixed costs are $340,000 annually. Calculate the firm's break-even point in dollars. O a. $651965.48 O b. 651965.48 units O c. $619872.38 O d. $621,572 O e. 619872.38 units