A: 21-15-9-6-3 reps of 
hollow rocks (hold 10# med ball above head)
abmat butterfly sit-ups

B: Every 3 minutes for 21 minutes
21/17 calories ski
60m farmers carry (70/53# kettlebells)

I opted for the ladies calories and weight on the farmers carry because I am not as strong on the SkiErg as I am on the rower. Done correctly, both the SkiErg and farmer's carry require you to engage your core, made all the more difficult by part A. Finished each round with ~1:20 of rest. Did not check ahead of time where the drag was set - 139 seems to way too high for this type of effort.