Here is the COA (cost of attendance) document for the school. Note the in state vs out of state difference and the personal and travel expenses that are included in the COA.
https://finaid.olemiss.edu/cost-of-attendance-2021-2022/ Schools are more likely to cover up to the COA than above that number. The Personal and Travel expenses could be dispersed to the student.
View attachment 9018
In this example, a nonresident student in possession of an HSSP Type 2 scholarship would receive $18,000, which the school would credit against the tuition portion of the Total for Nonresidents.
That tuition portion = $8,718 Tuition [ i.e. the in-state tuition fee ] + $16,272 Additional Fee for Nonresidents = $24,990.
$24,990 less the HSSP $18,000 Scholarship = $6,990 for Tuition, which would bring the total cost down to $24,024 for a Nonresident.
Now, if the school were to offer you a scholarship to be used against tuition -- as merit scholarships aimed at nonresident students usually are required to be used -- then that scholarship, regardless of how large, could go up to $6,990 and no further for the nonresident. IOW the school will usually not put cash in your pocket with their merit aid; the goal is merely to bring down the cost of tuition.
But again, some schools may take a different approach. Check with the Financial Aid folks -- go to the source.