Merging Tabulate Area Results by County?

[caleb-thomas-smith]

Hi all! I'm working in ArcGIS Pro v2.4 w/all extensions. I have a bunch of tables that are the result of running the Tabulate Area tool on a series of raster map tiles to calculate land cover by county in the United States. The issue I am running into is that some counties are covered by two or more different map tiles, so some tables have the partial results for the part of the county that was covered by the map tile.

I thought I'd be able to just run the Merge tool and use field mapping to apply the Sum merge rule on the value fields that need to be added together, like this: 

Instead, I'm getting duplicate records in the table, like this: 

Any idea what I might be doing wrong, or if there's a different tool/process I should be using instead?

[DanPatterson · Accepted solution]

Summary Statistics (Analysis)—ArcGIS Pro | Documentation

with FPS as the field to summarize on using the "Sum" option

[caleb-thomas-smith]

That does the trick!! Thank you so much!!