count unique values in filtered column

Hi,

For data in Column U on Sheet1, I would like to count the number of unique numeric values that appear when different filters are set and paste this number into sheet "Results".

I don't know if this is possible, but if there is any way that a formula could be pasted below at COUNTUNIQUEVALUESFORMULA which accomplishes this, that would be awesome.


Here is the relevant snippet of code from my userform:

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Thanks!