I help out with the production of a periodical that is journal-ish [0], and the biggest expense is printing and mailing. But it's ran by a non-profit, our editors are all volunteers, we don't do peer review, and our authors typeset the articles themselves, so this is definitely an atypical example.
Surely you charge printing and mailing to the people you are mailing to though.
Yes, we charge $35 a year (for 3 issues) for printing and mailing, which is just a little bit more than what it costs us.