We would pay to see a documentary about Dunder-Mifflin's complex relationship with Hammermill Paper. In season 2, episode 3 of The Office, it is established that Meredith is boning a rep over at Hammermill in order to get favorable rates, which implies Dunder-Mifflin and Hammermill are in business together. In Season 5, episode 2 Michael brokers an agreement that allows Dunder-Mifflin to "finally" sell Hammermill products, which were previously "exclusive with Staples." While we wouldn't put it past Meredith to be ill-informed, it seems that the business relationship between Dunder-Mifflin and Hammermill is unclear at best, and is at least a bit dodgy.
There Is a Mysterious Relationship Between Dunder-Mifflin and Hammermill Paper