Douglas:
Sharon appears to be using a laser printer, which works differently to inkjet ones.
Sharon:
Assuming that you are, indeed, using a laser printer, have you given the toner cartridge a shake? It's a standard way of extending the life of a cartridge that's running low and should be mentioned in the manual for your printer.
To see how many pages you should expect to get from a toner cartridge, look at the illustrations here for examples of 5%, 10%, 30%, 60% and 80% coverage, to see which is closest to what you typically print out. Then use the calculator below those illustrations:
https://www.tonergiant.co.uk/blog/2014/08/how-many-pages-will-my-cartridge-print-before-it-runs-out/