https://www.prink.co.uk/1-x-mix-and-match-4-pack-replaces-canon-pgi-520-bk-and-cli-521-bk-c-m-y-gy?for-use-in-canon-pixma-mp980&sf=1&cat=498
For Canon Pixma MP980 - 1 x Mix and Match 4 Pack Replaces Canon PGI-520 BK and CLI-521 BK-C-M-Y-GY
Mix and Match set of 4 ink cartridges compatible with Canon PGI-520BK and CLI-521 (521 BK and 521 BK C,M,Y,GY) for use in your Canon Pixma MP980 printer.