Question 6 The revenue per month earned by the Couture clothing chain at time t is RR) = N(t)3(t), where N (t) is the number of stores and S (t) is the average revenue per store per month. Couture releases a statement to their investors saying that currently they have 50 stores with a total revenue of $7,500,000 and expect to increase the number of stores by about 2 stores per month and increase total revenue by about $250,000 per month. What does this statement imply about the current rate of change of the average revenue per store per month