Team Conditioning (anaerobic intervals) Workout

In teams of 3, for calories:
30 x 20s Assault Bike
- Rest 2min
30 x 20s Ski Erg

Only one team member works 20 secs at a time and then rests for 40s while the other 2 members complete their 20s of work. So its 10 x 20s of work / member / machine.
Score is the total calories completed in all of the intervals.