Xerox 8R7660 Black Compatible Ink Cartridge Xerox Sale! from 1839 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Xerox 8R7660 Compatible Ink Cartridge - Xerox 8R7660 Compatible Black inkjet cartridge. For use on Xerox DWC 450C, Docuprint XJ 4c, Docuprint XJ 6C, and Docuprint XJ 8C printers.