No points for a DNF. Unless you picked a sub that finished you have lost a few points. It's ****ty but it happens.
To calc your score.
100 points for 1st in tourney
99 for 2nd
98 for 3rd
Add up your players position points; multiply your capitan's score by 1.5
Monster, C-PD, Valk, Sidewinder, Underworld, Whippet, Gator, Proto Spider, SS Wizard, R-pro Dart