Help with measure

Hello,

I have two tables connected by unique code.

in those tables I have a column with another code (not unique, it identifies an area location inside a farm) where certain operations have been done.

I have a line for each operation that has been made in each of those places.

I want to sum the plantation operation areas for the codes that also have reposition operations.

So in conclusion, I want the area that was planted that needed reposition.

I assume I would need to create a measure that for each code it evaluates if there is a line with a resposition, and then it adds all the plantation areas for that code. Not sure how tho