Click on the Customer Maintenance tile, then click on Licenses and then License Usage Detail. This will display the various licenses your organization has purchased.
By clicking on an individual license, you can see which users have been using the license and how many times they have performed lookups on products within the license package.
By clicking on one of the numbers in the table you can actually see a display of the actual lookups themselves. This feature provides an in-depth monitoring tool for Administrators.