Coaches salaries are a negotiated item in the districts collective bargaining agreement, and can vary fairly significantly from district to district. This should be detailed in the supplemental salary document portion of the negotiated agreement. This is a public document and if not available on line on your districts homepage, must be provided to you upon request.
One thing that would be unclear is where exactly a wrestling coach would fall, and would probably be part of the next contract negotiation. Most supp contract scales are teired. Generally the highest tier is reserved for FB coaches, the 2nd for basketball coaches. Wrestling coaches are generally on the 3rd tier, sometimes 2nd.
Don't forget about assistant coaches as well. Find the assistant football coaches, and move 1-2 tiers down from them!
Hope that helps!