HP

HP sells 850 million cartridges per year and the average prints 240 sheet. These sales bring in $1.7 billion dollars per year. When a new cartridge is installed, the instructions are to run a test sheet to align the paper and this results in using up 3.5 million cartridges and giving HP an additional $70 million in profit. I have used an HP printer for 20 years and have never run the test sheet. Maybe