Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question. Solve the problem.
-A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by Find the rate of change of unit revenue when the unit cost is changing by and the unit revenue is $ 2000.

A) $ 110.00/unit
B) $ 724.25/unit
C) $ 1124.00/unit
D) $ 324.50/unit