@Nessa7
We can't tell you how much Windows 10 will cost you because that varies by (1) the version you buy, and (2) where you buy it from. But in general, Home is around $100, and Pro is a bit more than that.
Here is a chart comparing the different versions of Windows 10: https://peakup.org/blog/windows-10-edition-comparison/
Unless you really need to Pro features, you are better off buying Home.
And ... these are NOT the HP versions as HP does not sell Windows to consumers.
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