A/C oil for A/C parts

I am replacing most of the major A/C parts in my car (compressor, condenser, receiver/dryer), and I know I need to put PAG 46 AC oil into all of those parts when replacing, but can't find any guidance on how much oil to put into each. I believe the whole system is supposed to have 7 oz (but haven't been able to confirm for the 2010 model specifically). And I know generally you just see how much oil is in the old part you're replacing and put that much in the new one, but on the compressor, I don't know how much oil was in the old one because a mechanic replaced it months ago (compressor was making the serpentine belt smoke, but I didn't want to replace the whole AC system at the time, so he just put a new compressor on without hooking into electrical so the belt would work). Do you have any guidance on how much oil should generally be put into each of these parts?