With a 12:00 running clock: 
0:00: Max AbMat Butterfly Situps
1:00: Max Calories RowErg
2:00: Max AbMat Butterfly Situps
4:00: Max Calories RowErg
6:00: Max AbMat Butterfly Situps
9:00: Max Calories RowErg

R1: 18/15

R2: 27/30

R3: 37/46

TOTAL: 82 SU/91 CALS

Get warm on the rower prior to this effort. Focus on smooth transitions, leaving the straps loose on the rower.