Use this information for Rusty Co. to answer the questions 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 Price Price Unit Contribution Product Unit Variable Cost X Y $110 $70 Margin $40 20 70 50 What was Rusty Co.'s unit variable cost of the overall product E? O a $50.00 O b. $52.50 O c. $70.00 O d. S120.00