Users controlling content access

Hi I am building a site where I have various subjects(categories) in my site, users would most likely not need all the subjects so I would like to have three membership levels:
Bronze: access to one subject
Silver: access to three subjects
Gold: access to all subjects

Obviously doing it this way would mean users would have to pick and choose three subjects that they want access to and then only be able to view that content if it was a silver level subscription.

Is it possible to do this with your plugin? or be able to pay per subject or something like that?

Thanks,
Matt

You could sell them as custom capabilities. Have the user first choose which he wants, and then load a page to pay them.

These will help you:
Video » s2Member (Custom Capabilities)
Knowledge Base » Using Variables In A Shortcode