I am not sure why you need that since your formulas are directly under each of those column headers and they can be copied across (the last range I$5:I$65535 would adjust to J$5:J$65535, and so on).
But if you must.... then we will need to revert to an array entered Sum(IF()) formula since the I:U range has numbers and text.....
so the new formula in I4 would be something like:
which must be confirmed with the CTRL+SHIFT+ENTER keys, not just the ENTER key. You will notice { } brackets appear around the formula.
Then you can copy across.
Edit: Actually that last range in this formula can be expanded to include all columns
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