R&B Mixing and Mastering Expert

I'm seeking an experienced audio engineer to mix and master an R&B track. The project budget is $150.

Requirements:
- Focus on vocals, instruments, and bass; essentially the entire song.
- Professional quality is a must.

Ideal Skills and Experience:
- Expertise in R&B genre
- Proficiency in mixing and mastering
- Strong attention to detail
- Experience with industry-standard software and tools

Please provide samples of previous work.