Suppose that you own a local chain of 10 grocery stores that sell oranges. (Assume that the grocery stores are all the same in terms of customer composition, products sold, etc.) You are interested in determining whether or not you are maximizing revenue on the oranges you sell. Devise a plan to calculate the arc elasticity of demand for the oranges. What data would you need? How could you get that data? How do you use the raw data to tell you if you're maximizing revenue?