What is low cost you ever get ?

Hi, I hope you are all fine .
Every one tell us what is low cost per engagement get on facebook ads targeting united state users ?

Don't spend money in Facebook ONLY if your ads convert to something to MAKE MONEY directly with !
Ex: I spend 5$ -> I make 15$ sales

People who spend money for engagement -> If your fans don't engage = they don't care, that it !
People who spend money for likes -> If you don't grow naturally, change your business (fans are going to dislike after all one day)