Amazon.com: Calculator Ink Cartridge
https://www.amazon.com/calculator-ink-cartridge/s?k=calculator+ink+cartridge
WebIR-40T Ink Roller Cartridge for Printing Calculators and Adding Machines, Black/Red Pack of 2, Used with Casio HR-100TM HR-150TM HR-170RC, Sharp EL-1750V EL-1801V, CATIGA CP30A CP90A. 998. 300+ bought in past month. $699. FREE delivery Fri, Feb 2 on $35 of items shipped by Amazon. Or fastest delivery Wed, Jan 31.
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