Team WOD: AMRAP 20 mins: Partner Runs, Overhead Squats, Box Jump Overs and Back Squats

As a team of 2 complete as many rounds as possible in 20 mins of:
Partner Run 400m
20 Overhead Squats (45#/33#)
20 Box Jump Overs (24″/20″)
20 Back Squats (45#/33#)
* Share one bar, run as team and split up reps