Partner WOD Workout

AMRAP 20:00 with a partner:
30 Clean & Jerk @40/28
30 Clean & Jerk @50/35
30 Clean & Jerk @60/40
30 Clean & Jerk @70/45
30 Clean & Jerk @80/50
*One person works at a time.
Score : total reps
you must increase the barbell after each set of 30 reps
Goal: to get into the last set of 30s !
Scaling : use smaller jumps in loading