How can I save money on ink for my HP Envy 5660?
You can save up to 50% on ink by signing up for the HP Instant Ink service at hpinstantink.com. The savings claim is based on the HP Instant Ink Service plan price for 12 months compared to the cost per page of the majority of color inkjet printers under $399 USD. (Page 2)
From the official HP Envy 5660 E All-in-One Printer manual, page 2
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