Today's WOAH, like most, has various options available depending on what equipment you have to work with.
Option 1. If you have a bar or a reasonable weight of dumbbell, at least a 16” box, then Reps are as written. Male weight 40. Ladies weight 25.
Option 2. If you have a lighter single dumbbell, then Reps are per shoulder and if you only have a low step then step ups are each leg.
Option 3. Depending upon your level of fitness, the step ups can be weighted.
E.g. weighted vest or dumbbell/kettlebell/plate
50 shoulder press
50 step ups
40 shoulder press
40 step ups
30 shoulder press
30 step ups
20 shoulder press
20 step ups
10 shoulder press
10 step ups
22.5kg DBs 24” box steps —————> 15’00”