Good afternoon everybody. I would like several colleagues on the page who reside in countries such as Chile, Argentina, Colombia, Ecuador and Peru about the costs that apply in terms of preventive maintenance of the air, and in the same way that amount is usually charged for the installation of 12,000 to 24,000 compressors and 36,000 to 60,000 btu. I am a native of Venezuela, but as you all know the crisis in which we live is so terrible that what I charge for maintenance only gives me to buy 06 breads and 02 soda, and every day the materials increase a lot and this leaves us Many with fewer jobs. I would appreciate a lot of friends, because all these countries have spoken to me very well and with my 22 years I want to have a decent life and to be able to create a family and today in my country, I will not be able to achieve it with the devaluation that exists. I hope you help me with this valuable information for me. Greetings.