This is a cracking spreadsheet Damo, thanks for it.
I've just spent the time to put in all my historical data going back to when receords began (1st May 2006) and one thing becomes immediately clear....
If I want to increase my profits I should give up all PL exclusive events!
Currently trying to work into the spreadsheet a method of adding the site (other than in the notes section) so that I can analyse (need a spell checker on this site) which I am most profitable on.
However from this I have set myself a target of $100 profit each month (on average), so it will be interesting.