Stop in for a cup of coffee

Looks like I oopsed on my air conditioning. Was hoping to get my buddy to charge it tomorrow. For some reason I thought I only needed 3 cans. Probably cause I was originally going to 134a -which uses less refrigerant. Full charge is 48-50oz. I have 2 12oz and a 14, for a total of 38. Still need 10 to 12oz more...So need to round up another can. Don't know if that will happen before Carlisle (hopefully someone will have it there -they usually do) Was really hoping to have it working before that.