Use this information for Rusty Co. to answer the question that follows. 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 What was the unit contribution margin of Rusty's one overall enterprise product, E? Do not round interim computations. O a. 522.50 Ob. 560.00 Oc. 540.00 Od $20.00