I have an HP 4315 all in one printer which cost me $79.00 at Staples. Since I use a lot of ink (granddaughters do their school projects on my printer) I used a $20.00 coupon from Costco for two triple packs (2 black, 1 tri-color): final cost was $58.00 for 6 cartridges. A dual pack of 1 black and 1 tri-color ususally costs around $32.00 here, no matter where I go. Occasionally the Walmart will have a double pack for $48.00, but not often. Find that the cartridges don't give you as much print as they used to.