Looking for an Atmos mix of a song

I’m looking for a Dobly Atmos mix of a song. There are 21 tracks to the song, which I can provide in wav format. The song will be released on May 3rd. What are your rates for an Atmos Mix? Also, is mastering necessary when it comes to Atmos? Thanks! I'll stay tuned, Caleb

Additional info:
The tracks are cleaned, tuned, and and the song is ready to be mixed. I'm interested in working with a very experienced mixer. I'm an indie artist. The song has somewhere between 10 and 30 tracks recorded that need mixing. I need it by 17 April, 2024. I'll need you to master it too if possible.