PIXMA MP830. I can't believe how often I have to replace an ink cartridge...The printer is

Question

I can't believe how often I have to replace an ink cartridge...The printer is freestanding...not tied to a computer.....I only print black and white and very few pages at that; however, I have to replace some cartridge about every week or so....Is there a setting that would reduce this excessive use of cartridges especially since I only print black and white?? or do I need to trade the unit in for some other model...I've had the printer for 1+ years and find the replacement of cartridges seemingly unnecessary and very expensive...SS# AAET46090....thanks...Basil Howard