820
HP raising Instant Ink subscription pricing significantly
(www.ghacks.net)
This is a most excellent place for technology news and articles.
They could have made this subscription far easier and fairer if they wanted to. A service that simply buys a new cartridge once your existing one reaches a threshold (say 20% left) would be simple to implement, simple to understand and even be quite useful. Instead this Instant Ink thing is an abomination of multiple tiers and price gouging.