Expert help please - Profile FM-165A

I am filling out the Profile for the last time (yea…) for my rising senior. Her sibling will be a freshman in college in the fall, and will not make his choice until May 1. For FM-160, I was planning on taking the highest-cost college to which he has already been admitted and putting down the total COA on that line.

FM-165A, however, is confusing. “How much will your parents pay for this person to attend.” We have a financial aid offer and a small merit scholarship from the expensive private. Should I deduct those from line FM-160 and put that amount (which is after all, what I will actually pay if he attends) on line FM-165A?

Or maybe I should take the less expensive school to which he has been accepted, but from which we do not have FA offer yet, and put the COA on both lines FM-160 and FM-165. Thoughts?