Dear [sir],
I am writing in response to your advertisement for an article Writing, Content Writing Specialist for your project.
I can send you a sample before working.
Relevant Skills and Experience
Besides all of the article and content writing experience that I have, I am also an excellent communicator, a quick learner. I believe I am an excellent candidate for a job with your firm.
Proposed Milestones
$45 USD - milestone
Thank you so much for your consideration and hope that we will have a chance to work with you soon.