Charging for Access

Question

Hello, Can anyone recommend a software package that has the following features:

1. Allows admins to post content into one of three categories.
2. Content in category #1 is available for free to registered users
3. Category #2 is available for a one time fee or a "standard" yearly subscription
4. Category #3 is available for a different one time fee or a "premium" yearly subscription.
5. The first 2 paragraphs of all content is available for free, even to unregistered users.

This strikes me as a wordpress blog with some plugin, but I can't find an approp. plugin,