In that estimate the egress is included. It’s a total of storage + egress per TB stored.
Your node stores more or less real customer data. How much you can make depends on the customers usage pattern. You may be lucky and store data that gets frequently downloaded/streamed (like this). But you also may be ‘unlucky’ and store parts of cold backups that get never downloaded. We recently heard from a real lucky SNO: High egress on small node vs larger ones