If you grab a copy of the Free "Post Charges" booklet from the PO next time, everything is in there. Latest is dated 1/10/2018.

They produce a new one twice a year in line with their increases.

Once you get used to working with it, it is very helpful and on hand, I keep mine next to the screen so easy to grab.

Any special info I just highlight or write in and carry over from booklet to booklet.