Well according to the Art Reed videos, I think it's something like: Lessons 1-90 in the Advanced Math book is Trig./Geometry/Adv. Alg. Then for Pre-Calculus, go back to lesson 60 of the Advanced Math Text, finish the text, then complete the first 25 lessons in the Calculus book. That would be considered Pre-Calculus. Then you would finish the Calculus book as the Calculus course.
On saying all that, my son did the 1-90 lessons in the Advanced Math book last year as a sophomore. This year as a junior, he's enrolled at the community college for his math courses. He placed at the Pre-Calculus level, is currently taking it, but says he hasn't learned anything new. Next semester he'll take Calculus I.