This will need to be completed by next Tuesday.
My client has a site that has articles. You will need to make it so the client can enter a summary of the article in the backend that will display a summary of the article in the front end. He uses Joomla for this. Also a full version of the article will need to be entered as well. I'm pretty sure he already has this set up on the backend somehow. He is submitting articles using Joomla so I think you'll just need to modify what he has.
The summary will say at the end of it "click here to read the whole article". The user will than be redirected to paypal express checkout (which is on paypals site, so no ecommerce coding is really needed). After they pay to read the article they will be redirected to either a page showing the ENTIRE article or back to were the summary page was, but now instead of the summary they will see the entire article.
I've seen site's do this many times. I'm hoping someone can do this with ease or just use a module out there that has this functioning in it.
Also you may I need to install a Paste from Word plug-in into the site, this should be fairly quick and may not even be needed to be done.