This is where you get to pay for your printer!
From a quick search I guess that this printer is fairly new, and I cannot find much in the way of re-manufactured cartridges to help
However, the contents of the cartridges you describe is about what you expect from current new HP printers
The cheapest I can find the HP manufactured cartridges is at mouse2housedirect.com who quote 1 black 1 colour at £29.99 inc vat or 2 of each at £24.67 per set
Before too long you should expect the remanufacturers to come up with cartridges which will probably contain 2 or 3 times as much ink at prices lower than the originals, and for most purposes these will be just fine