Penny Wise, Printer Foolish: 10 Ways Not to Save Money on Printing - 'Buy the Cheapest Cartridge: Lasers' (
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For printers you already own, you may have a choice of cartridges, with higher-capacity cartridges costing more. For lasers, the less expensive cartridges may look like a bargain, but here again it’s the cost per page that matters, not the cost per cartridge. The higher price cartridge will usually cost you less per page.