I first wrote down on a note how many exams I had to print for each subject. I had already printed one version of each subject, so I took all of those to the copy room. There I started with the first subject. I put it into the copy machine and put in the settings I thought I required. I checked the first one that came out and that seemed to be correct. I stapled each individual exam and made stacks of each type of exam. I put a note on each stack describing the subject and level of the exams. I continued to do that until all exams were copied in the correct amount.
These steps seemed to lead me to the results I wished.