Tired of buying ink the price of caviar!

I just received the package and for the moment I installed a color cartridge for my printer refused to print even in NB (thank you Mr HP take us for cows by forcing us to consume products that are more / not needed). In short, I ran a test and everything seems to function to normal. Note that it appears that the cartridge reservoir is larger than the original XXXL hence the reference in the title.

So, it challenged me. So I enjoyed doing research and some small calculations Based on the original HP package that approaches it, namely the value pack HP 363 color cartridges with 5 + 1 black and 150 sheets offered.
- The original black cartridge contains 6ml to 43ml vs this one
- The original color cartridges contain 3.5 ml to 6 ml (Magenta: 3.5ml - Cyan: 4ml - Light Magenta: 5.5 ml - Light Cyan: 5.5 ml - Yellow: 6 ml) vs 18 ml each of this pack above.

On this basis and assuming that the original pack sold at 46.98 euros at Amazon right now contains a total of 6 + 3.5 + 4 + 5.5 + 5.5 + 6 = 30.5 ml, 1.54 euros per ml or 1,540 euros per liter !!! There however in order to justify such a price ??? Caviar, diamonds, precious metals? The guy who filled ink cartridges What is his hourly rate, it rolls Porsche and flies in a private jet?
In short, if we compare all this to the pack that is the current price of 11.90 with a capacity of 18ml + 43ml * 5 = 133 ml, the price of ... is 0.09 ml euros (90 euros per liter ) ... 17 times cheaper than the original pack ... then is that the pigeons?

Sure, the original pack contains sheets of paper, but I think like many, these sheets are used infrequently or not, especially since they are supposed to be offered to get the price pill (rule of thumb: the more buys in quantity, the less expensive the unit price paid) as original cartridges purchased individually bring back all at over 100 euros (11.90 + 29.62 * 6 colors for the black version XL)

If over time the quality is confirmed (and even if it differs slightly), it will be an excellent deal. Farewell original and finished making me rip!