Use this information for Rusty Co. to answer the question that follow. 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: Unit Selling Unit Variable Unit Contribution Product Price Cost Margin X $110 $70 $40 Y 70 50 20 What was Rusty Co.'s sales mix last year?

a.12.5% X, 87.5% Y

b.60% X, 40% Y

c.58% X, 42% Y

d.30% X, 70% Y