I know that I have to have permission to use any of MLB’s logo to use on my products that I want to sell, but is it easy or costly to do it? I already emailed a team to see If I can have their permission to use one and I got a reply saying that I must get a MLB licenses in order to do it, but does that cost a lot to get? and what exactly is a MLB licenses?

Thanks in advance for your time answering and reading.