I've fixed up the sheet so all the numbers add up right and set the averages at the very bottom, for 20 years of recordings..
I only play with spreadsheets once a year and every year it is the same, Takes a couple of goes to get my head back around it,
got going and knocked it over in no time.
However the sig area won't let me add my link as it is to long. I've PM'ed Paul to see if it could be made a bit bigger.
IN the meantime

https://docs.google.com/...owR3tS8/edit?usp=sharing



Cheers