please help me with this last two questions

Rusty Co selis 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: Unit Selling Unit Variable Unit Contribution Product Price Cost Margin $110 $70 $40 Y 70 50 20 Rusty Co.'s sales mix last year was Ca. 58% X: 42% b. 60% X: 40% C 30% X: 70% Y d. 12.5%X: 17.5% When a business sells more than one product at varying selling prices, the business's break-even point can be determined as long as a. there is no limit b. the number of products does not exceed fitteen c. the number of products does not exceed three d the number of product does not exceed two