You get 120 points and subtract hull size to make a cap on combat readiness.
Then you get a multiplier to that point cost based on AI core size, with better cores resulting in a greater multiplier as a penalty.
In other words, the better the AI core in your automated the ship, the lower you efficiency cap becomes.
That is completely illogical, however. A ship operating without a weaker core, or worse no core at all, should be the more expensive option, not the other way around. Your AI core is there to run the ship, after all. The stronger the core, the better it will be at maintaining the ship and thus it should run more efficiently and thus have a lower cost to your combat readiness cap.
In other words, if a ship cost 60 points with no core, then an Alpha core should be dividing that cost by 4 rather, not multiplying it.