Hi,
"Technology Rocks!" I have more than two years experience in writing about science, technology and a number of other categories. However, technology remains my domain. You can see my complete portfolio here: http://www.allvoices.com/users/arkar
Following are some of my recent technology-specific articles:
http://www.allvoices.com/contributed-news/14815016-google-launches-test-balloons-to-provide-internet-to-remotest-spots-in-the-world
http://www.allvoices.com/contributed-news/14785761-apple-unveils-new-ios-7
http://www.allvoices.com/contributed-news/14914508-researchers-create-conact-lens-with-telescopic-vision
http://www.allvoices.com/contributed-news/14756750-nasa-rover-curiosity-preparing-for-next-stage-of-mission-on-mars
http://www.allvoices.com/contributed-news/14907499-next-generation-imager-captures-rare-images-of-the-sun
http://www.allvoices.com/contributed-news/14898299-new-twisted-light-able-to-transfer-16-terabytes-per-second-in-optical-fibers

You can judge my grammar and communication skills from my sample work.
I can produce 14 good quality articles of 400-500 words every week @$10 per article. I will produce 90 articles in 45 days within your stated budget.
My professionalism and work ethic would never allow me to plagiarize. None of my work to date has been detected for plagiarism. You can check my sample work.
Currently I am writing articles for Allvoices, one of the largest news portals of the world. I work for them 2-3 hours per day.
I look forward to your response.
Thank you.
Regards,

Kamran