Count dynamic search

Hey guys, im trying to count a certain age duration in my database and cant seem to figure out how to get a sum return.

I have a data set for an item with an date duration to determine the age of the item. Then I have a dataset for an certain age that if an item is over this age id like to display it.

I cant seem to search items that have this date duration that is equal to or greater than this data set custom number.

I just want to count how many of these items exist that the age duration is above this certain number. Any help would be awesome. Thank you.

Can you send a screenshot of where you’re stuck?