How does scoring work in the Pro-Leagues?

How is my Pro-League score calculated?
Completing a level gives you a base score defined by the completion percentage. I.e. if you completed 75% of a level, it will grant you 75 base points.

Each level also applies a multiplier to that base score which increases depending on the difficulty of the level. Thus, multipliers from the last levels are higher than multipliers from the first few levels.