Private changing rooms for tennis players are available at t…

Privаte chаnging rооms fоr tennis plаyers are available at the swimming pool in Misk, Belarus. The quantity demanded for these facilities during each of the last three months of 2019 is shown in the table below.   Month Quantity of private facilities demanded October 2,800 November 2,400 December 2,100   Calculate the total excess demand for private changing rooms for the last three months of 2019 if the quantity supplied during each month was 2,000 (6,000 in total). You are advised to show your working.