M365 Volume Licensing

I’ll admit I’ve never really priced M365 for a large organization. Microsoft lists the monthly/annual cost of M365 per seat on their website, but I know those are usually handled through a value-added reseller or consultant of some kind, and I’d imagine those contracts are often discounted based on the size of the organization and terms of the agreement.

I’m curious…ballpark, for an organization with say, 3000 administrative users who would likely need/prefer Office desktop apps (some kind of mix of mostly E3 and few E5), and maybe 20 thousand FLWs who would definitely just need the web apps/email (F3)…what kind of discount could an organization expect?

Thanks!