Warmup:
3 rounds of:
10 walking double lunges (lunge, then high knee, then back down to lunge w/ same leg)
10 kb swings (12 kg)
10 lateral hops over kb

Workout:
For max reps/calories:

5 rounds of:
Row 1 minute; rest 60 seconds

Then
5 rounds of:
:20 double unders
:20 squats
:20 situps
rest 60 seconds

82 cals + 279 reps = 361 total
(my double unders got wonky in the first 3 rounds, I'm pretty sure I'd have hit 400 if I hit those double unders)