Materials were $7000 that means it will easily be over $25,000 after adding engineering, labor (they weren't counting these), shipping and handling, retail markup and taxes.
I just bought an injection molding machine today
I looked into manufacturing with 3D printers and the per unit cost is pretty high. You pay a premium for getting something custom and quick. With traditional injection molding you have to have a mold and that can be expensive but the manufacturing cost can be pennies per unit depending on the size of the part. For 1sies and 2sies 3D printing is nice but injection molding will also be cheaper for volume. I think where 3D printing really has a future in manufacturing is where you make the mold with a 3D printer and then use it for injection molding for production.