For your money I will mix your the audio from your commercial or spot unto 60secs long.
What I will do you for project.
Edit dialog so is smooth and constant.
Mix VO and Dialog to sound big an bold on its medium (tv/film/online)
Add Sound FX : at your review you can use or loose these depending your preference.
Mix the music (level it out and make transitions smooth and unnoticeable)
Provide the mix at your chosen technical output level (all worldwide standards covered)