The files can be uploaded to my Dropbox service once the payment has been completed in 16bit or 24bit WAV format.

Always check your material before sending by loading it in your DAW. Check if everything is in line and the material sounds the same as the rough mix. Except from the dry vocals.

I'll deliver the main mixdown, instrumental + acapella, these are included in the fixed fee. In Wav 16bit, Wav 24bit and mp3 format.
If you would like more stems or multitracks, these will be delivered by hour rate.