134a their cost is +\- 20$ , evacuating is essentially just a matter of time. 45 min is avg for getting a good vacuum. They should also charge the system with nitrogen (5$ worth max) to make sure u dont have any leaks before putting it on a vacuum. All in all max of an hr and a half at 60/hr is 90$ + (25 *.35 markup) = 123.75 + tax. Hope that helps