Rusty Co. sells two products: X and Y. Last year, Rusty sold 5,000 units of X and 35,000 units of Y. Related data are as follows: Product Unit Selling Price Unit Variable Cost Unit Contribution Margin X $110 $70 $40 Y 70 50 20 For break-even analysis, the unit variable cost of M was a. $120.00 b. $70.00 c. $50.00 d. $52.50