Nexus 5 - How to downgrade from Android 5.0 Lollipop to Android 4.4.4 KitKat.
The cost to replace Freon varies by the amount needed since it is charged by the pound. The typical charge starts with an $89 service call to visit the home and inspect your AC system. From there, the cost to add Freon is $68 for the first pound and $58 for each pound thereafter.
Put a vacuum pump on the system and put 2.5 kilo of r22 back into system, I charged the customer $100 in total for the gas and my time. Because of mandated production cuts in R-22 (the most common household refrigerant) the cost of freon has doubled over the last couple of years.