[ricardobeat]

The line numbers don't start at zero. The guy on the left has 9 days (spot on), the rightmost 21.

By the way this post is from May 2016! I wonder how they are doing by now.

[unreal37]

You can see their vacation spreadsheet as it's public!

https://docs.google.com/spreadsheets/d/1EhvYITqDk-vGzM9yy1uS...