The Epson WorkForce Pro WF-3720 has an ordinary inkjet cartridge system. There are three different color cartridges, so you only need to change the ones that run out the most often. The color page yield is very good as well. However, the black page yield is quite bad, considering it’s only a few pages more than the color yield. On the upside, there’s a high-capacity version of the black cartridge available for purchase, which should last longer.
This printer accepts third-party cartridges, but this could void its warranty, and special attention must be paid as this printer uses pigment-based inks.