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It means mark up. But, I can't remember how to use it. I know you can find out how much a 15% markup on something would be, etc., but I've got to figure out how to use it again. It's been awhile.

Hope this helps explain the maths...

£100 x 15 MU gives £115...ie same as x 1.15


No idea what the plus minus divide buttons do, probably spurious answers

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12y ago

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Q: How do you operate mu button in calculator?
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