Printers using HP Type 14 cartridges need only two cartridge SKUs - one for black ink and one for the tri-color cartridge containing cyan, magenta and yellow inks.
Note that the OfficeJet 7110 All-in-One MFP in this family is different from the Officejet 7110 Wide Format ePrinter that uses separate color cartridges for cyan, magenta and yellow inks (HP 933).