The price depends on the people and how much they are willing to buy it for. In Alpha prior to shutdown, the lowest price i saw was 2 awd for 1 P Note, and highest was 5 awd for 1 P Note, average 2.5 awd per P Note. In survival, it will be easier to get P Notes (slightly), so prices will probably be lower. I for example, am buying them at 1 awd per Note if anyone is selling. We will have to wait some time to see where the price settles.
PM Notes are made by exchanging P Notes. I don't know the current exchange rate (in alpha was 1 P Note for 97 PM Notes), here in survival, i have heard that depending on the location the exchange rate might be different?