Urgent proofreader/editor required for 6 articles (500 words)

I need an urgent Native English editor/proofreader to do a quick job on 6 articles. I'd be paying $0.5 per article. If the job comes out to be fine, the right candidate can expect 10-15 articles everyday. The editor should rule out all flaws, grammatical mistakes and sentence structure errors. Please edit the attached short text and attach with your bid. It'll be a quick job so don't expect a day or 2. I need these articles within 3-4 hours. ( They are not very bad but needs tweaking to make it flawless). Set your bid $30 and bid only if you are ready to accept price. Thanks in advance for all the help.