Turns out that formula is right. And the fee wasn't $564 that came from other fees. It was like $385.Nope, it was just one day.
The rate was 0.275.
I've no idea how that is even calculated.
So 200 sharesx0.275x7?
Just a guess.
I am asking tradezero to see if they can waive some of this fee for someone ignorant but I doubt it. They probably just made this fee to cheat unexpected customers.