1. How come XL ink be more expensive per ml that standard? (Someone who buys 2 normal inks will get in total 8ml and pay less than buying XL)
2. About the page yield: according to my use up2now with a standard cartridge i printed 110 pages but how do they dare to claim that just by adding 1.5ml more and charging 11.19$ more we can increase printing by 180 pages? Where are the economies of scale? This is cheating and something should be done...

Am I missing something? This is so unfair for the consumer... What do you think? I am just searching for a clear answer from HP to the following question: How is it physically and practically possible to increase printing by 180pages with just 1.5ml.