A:
Starting with the 1st. Part of your question..
The answer is about 50More pages of Black Printed Documents and about 25 More Using Color Ink. Just be aware that HP printers use "Other colors in processing" so your other cartridges will also be used when printing in Black ink Modes. 2nd. Part...
Not sure what you're referencing? But if it's the HP website try "Googling" for the answer. I have found that very useful.