@dawn16 In standard training nomenclature, something like "3x5, 2.5 min rest" means 5 reps, rest 2.5 minutes, 5 reps, rest 2.5 minutes, 5 reps.
In other terms, you do each exercise 3 times before moving on to the next, as you stated initially.
This is covered in one of the Primer Build-up days...