Filtering Contribution sum by date in only one column

I'm trying to recreate an excel report as a pivot table. It's for Development and shows their progress toward goal for campaigns this year vs. the progress for those same campaigns on this date last year. One column is for this year and the other is the previous year. I don't need a date filter on this year, but I do need to filter contribution sum by date to get the "last year" number.

I figured out the formula for the date filter, I just don't know how to apply it to the single column and not the entire widget.

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