Step 1
Find the number of windows on each floor
In a large building, there are 10 floors, each floor has the following;
Step 2
Find the number of windows in a large building
Step 3
Find the cost the cleaning contractor will take to clean the windows in each building.
Step 4
Find the cost of cleaning all the windows in 22 large buildings
Hence, the cost of washing all windows in the 22 large buildings = $31,680