I've already typed all the formulas for 21 rounds though. Besides, with 18 rounds and 3 week finals, there's 3 weeks missing.
Talking about the formulas, the spreadsheet's nearly done. I'm going to make the captains worth double points too - if you didn't select a captain I chose the player with the best leadership experience - for example, with Deez Nutz I chose Sam Mitchell, because he has been the longest reigning captain out of the 18. (I picked him over Gary Ablett, mind you )