In teams of 2:
Buy in: 100 Double unders

Then do;
27-21-15-9
Row for calories
Thrusters 42,5/30kg

Buy out: 100 Double unders

For total time.

Person 1 starts on rower and person 2 on thrusters. When all 27 reps are done, they switch places and do 27 reps on the second exercise. Then they will move on to the sets of 21 and do the same.