Understanding Co-Mail Costs is Key to Comparing Printing Bids

Even though paper costs are ratcheting up, printing costs are still at an all-time low. It's pretty straightforward to compare competitive printing bids, but it gets tricky comparing co-mail costs and postage. Why is it so complicated? It seems printers want to keep it that way. Margins in printing are razor thin, and the profits for printers are in their co-mail programs.