Why are ink cartridges so expensive?

Related questions

1. Does the HP ENVY 4520 fax?
2. Is toner cheaper than ink?
3. What ink does HP Envy?
4. What ink is compatible with HP 63?
5. Does the HP ENVY 4520 print double sided?
6. Can you fax without having a landline?
7. What printer takes HP 65 ink?
8. Can HP ENVY 4520 print double sided?
9. Are HP 60 and 61 ink cartridges interchangeable?
10. Is HP Envy laser or inkjet?

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17. #either