15 simple 500 word articles for $22

I need a team or individual to write 15 SEO articles of 500 words. Articles must pass copyscape and most be void of typo and grammatical errors. I need the first 10 in the next 15 hours and may likely employ two writers to handle this project. Therefore bid with the number of articles you can produce within the next 15 hours. Also, i need to see samples of past work. NB: Milestone available