Here is what is found at the bottom of my score report:
According to this, you cannot calculate the TS by yourself because you will have no idea how many total you got wrong or right on the real thing. Of course, I guess if you're doing a practice exam, you would be able to.
AA is just the average of all minus PAT.
Also, I don't
believe that it is curved like the MCAT because we get out scores back immediately. The reason the MCAT takes 1 month to get back is because they need to standardize it and curve it against the test takers of that day.