when you consider how much ink is inside the cartridges,....
At one time they used to print the quantity of ink on the packaging, but not now.
My old Epson color stylus balck cartridge used to be 45ml
Whereas my new printer is only roughly 13 - 15ml.
It surprises me when ask the supplier, "What are the cartridge quantities" they either don't know, or can't tell you.