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so $400+$240 every 12,000+ pages, vs $400+$300 (10 x $30) for about 2,200+ pages?

It's not even close....

What printer are the second set of numbers in reference to?

Laser vs inkjet, avg ink cartridge does 220 pages.

The printer this article is about is a laser printer. The ink refill for $30 lasts 5000 pages and the drum lasts 50,000 pages.

Yeah, look up thread.