Estimated Cost of Attendance

haha so I made an account here just to ask this question because I’m honestly extremely confused. Why is it that people who filed FAFSA have a higher Estimated Cost of Attendance than people who did not file it?

People who filed FAFSA have a estimated cost of $35k while people who did not file it have an estimated cost of $31k. The extra $4,000 for the people who filed FAFSA is in the Housing and Meals section. Will I actually be paying $35k, while they are only paying $31k?