PRO & PRO-AM both score points in the same championship.
PRO & PRO-AM drivers score on different scales.
PRO drivers earning more points that a PRO-AM driver for the same position (for the top 14 places).
Qualifying points are allocated to where you finished in that race, usually a max of 10 people in the race.
Finals points are allocated to where you finished overall - so first in the B Final = 11th.
No matter what type the round is, there will always be a maximum of 300 points. This keeps the drop rounds fair (no double points round for example)