Marginal revenue the weekly revenue from the sale of emeralds at Eduardo’s Emerald Emporium (EEE) is decreasing at a rate of $500 per $1 increase in price and the price is decreasing at a rate of $0.45 per additional emerald sold. What is the marginal revenue?

I am not really sure what to do or how to set this up please walk me through the steps.
I am just not seeing how to set this up.

1 answer

weekly revenue rate = -500*1

Price decrease rate = -.45

Marginal Revenue = (-500*1)(-.45) = 225