Click on the cell with the calculation you want in.
It has something to do with the min deadline of the pool and the current basetarget (difficulty).
Some of the calculations are easier to decide than others, because of the number the pool owner published. (864.000 vs 10 days (10 • 24 • 60 • 60))
The spreadsheet is mostly up to date, many of the stats are automatically updated every time someone looks at the sheet. Few info nations might be incorrect, but it should be useable for basic searching. (Some pools are missing, most noticeable very big (as 99% of the visitors cannot use the pool or private pools)
I pull following information from the web: Reccomended plot size, miner count and reachable.