Meritline offers two Canon-Compatible PGI-225 / CLI-226 Inkjet Cartridge 5-Packs (pictured) for $19.95. (Choose the "2 Sets (10 Cartridges)" option.) Coupon code "MLC917YN" cuts it to $8.95. With free shipping, that's tied with our mention from last month and the lowest total price we could find by a buck (outside of the mention below). Each 5-pack contains a high-capacity black ink cartridge, regular capacity black ink cartridge, and a regular capacity ink cartridge each of cyan, magenta, and yellow. These cartridges fit several types of Canon PIXMA printers; see the "Compatible Printers" list on the product page for details.

Of note, DuraECO via Amazon and CARTRIDGEWAREHOUSE via Amazon has this 10-pack for a few pennies more.

Meritline also offers two Canon-Compatible CLI-221 Inkjet Cartridge 4-Packs for $17.95. (Choose the "2 Sets (10 Cartridges)" option.) Coupon code "MLC917YN" cuts it to $6.95. With free shipping, that's $4 under the lowest total price we could find for this quantity elsewhere. Each pack contains a regular capacity ink cartridge each of black, cyan, magenta, and yellow.