Audio Editing for Clearer Voice Recordings

I'm seeking assistance with editing some audio recordings. The recordings have technical background noise (like static and hum) and I need all instances of background noise removed to make the talks clearer.

Ideal Skills:
- Audio editing experience
- Proficiency in using audio editing software
- Ability to deliver high quality audio

Please review the files and assist in editing only the required audio from the clip. Let me know the cost.