Rusty Co. sells two products, X and Y. Last year Rusty sold 5,000 units of X's and 35,000 units of Y's. Related data are; What was Rusty Co.'s sales mix last year? 30% X's 70% Y's 60% X's, 40% Y's 58% X's, 42% Y's 12.5% X's, 87.5% Y's