Hey y'all, my AC has been pretty bad lately, blowing hot air out of the passenger side and lukewarm air out of the driver's side. Just dropped it off at a Kia dealership, and they said my 2018 Sportage needs a particularly expensive type of refrigerant. I was quoted over $400 for a system test and then replacement, if needed. Does that sound right? I can't find much information on the type of refrigerant needed for the system.