Find volume V
Length L = 20 feet,
Width W= 15
Height H = 12
Volume V a= Lx Wx H = 20x15x12 = 3600 cubic foot
Then for 1 year , it costs = 3600x 9 cents= 32400 cents
For 1 month , (divide by 12) = 32400/12 = 2700
Then answer is
Aircondition this office ,for 1 month costs $2700 cents
