Smitty's Smoothies have a fixed cost of 1600.00 per month

You are the manager of a firm that receives revenues of $20,000 per year from product X and $70,000 per year from product Y. The own price elasticity of demand for product X is -2, and the cross-price elasticity of demand between product Y and X is -1.5. How much will your firm's total revenues (revenues from both products) change if you increase the price of good X by 1 percent? 

1