How can I disable the display of the inventory quantity on a site?

PRESSERO > *Pressero FAQs
To stop the inventory count from showing to users on your site, you will want to change the permissions for the site group to which the user(s) belong.  Set the permission that is called "Ability to view inventory" to "not set" or "denied."  The site group permissions are found in Sites > [site name] > Site Groups > [site group name]