In 500 pages the cartridge is almost empty! How much toner was really in the cartridge? I have the toner used on 08.11.2014 in my printer. Since then, about 150 pages (only normal business letters no photos) were printed in mono and 40 pages in color per month. Currently showing the printer is only 10% (!!!) holdup in this cartridge. Of 2200 pages My result is miles away. This is more than disappointing. OKI original cartridges keep my experience significantly longer.