Question about Canon TX-220TS Scientific Calculator

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Coworker's calculator works fine for me but not for him

I ordered a Canon TX-220TS for a coworker and within a few days he asked me to replace it, saying it wouldn't stay on and he had to use the reset button on the back to make it turn on again. I took it and it seemed to work perfectly. Gave it back the next day, today he said it wouldn't even turn on this morning. I turned it on and again, no problems. What could be going on? He is not known for being great with technology, but a desk calculator isn't exactly newfangled.

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: tax rate

press button CA then TAX+ and enter tax rate figure, then press TAX+ again to store.

Posted on Oct 07, 2008

  • 5 Answers


Enter you percentage of you tax rate.
Hold down the Rate button and the Set button (also TAX+)
Then release The Rate button.

Posted on Apr 27, 2010

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2 Answers


Enter you percentage of you tax rate.
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