Is there a way to find out the average price per sheet of my printer? (HP Photosmart C4485)?

Not at all easy, especially for colour, and as all the colours are in one cartrige if you print a lot of a particular colour you could be throwing away a lot of expensive ink.





You may be able to find a review that covers print costs.





HP website may give a number of pages for the cartriges, then divide that into the cost of the cartrige, then add the cost of your paper, then add a bit for wear on the printer.





After that record what you print, when you change cartriges and what they cost and refine the initial numbers from above.