Completed with no cool on a 2009 Amana gas horizontal in attic 5 ton, found unit very low on 410A refrigerant, found very rusted evaporator coil with compressor pulling high. Giving customer the option to do all preventative repairs, minimum repairs or complete unit upgrade. Customer requested pricing to replace unit. Customer cannot make a decision on replacing unit since he needs to talk to wife. Customer approved to add only 1 pound of 410A even though it need more to get it to 8 sub cooling. Unit still not cooling the way it should due to being still low on refrigerant.