I can meet your objective of 20 310 word articles in 20 hours, compensated at 7 dollars per hour times 20 = 140.00 USD.
What you are asking is a huge challenge, and barring any unseen snags in your request I would like you to be my first challenge. I have always met deadlines with quick concise, on my feet turnaround time on projects of all media, and today is my first day here at Freelancer.com... I am eager to get an excellent rating.
Time is ticking so let's get started.