How much does 1ml of ink cost?

The answer is a lot!  However did you know that the cost can vary greatly for the same printer?  In another post I suggested that using the XL type cartridge if you can would save money.  Here is the shocking truth.  HP produce great products and they are the leaders in terms of inkjet market share so why produce 2 different cartridges for the same printer, don’t they make enough money already.  The 350 cartridge costs £14 on their website.  It contains only 4ml of ink so each ml costs you £3.50p !  The 350XL will aslo work in the same printer and it costs £29 for 25ml of ink so each ml costs you £1.16p.  That is quite a difference, £3.50 vs £1.16!  Other manufacturers are also doing this.

I think I know which one I would purchase.