Hi,
I'm currently in the midst of setting up and tailoring the Jira + Confluence combo for our development team. One feature we're really hoping to centralize in the system is a shared calendar that can be accessed by everyone, where we can plot out company events, workshops and vacations.
I checked out the 'add-ons' tab, and was met by this:

So, my question is pretty much whether or not an error has occured. We're paying $20 / month for Jira and Confluence combined. How can it be that a calendar plugin costs $500 / month?