In the data table in Tableau, you have columns for State, Re…

In the data table in Tableau, you have columns for State, Region and Sales. You have SUM(Sales) in columns and State in rows. If you want to give the user the option to see the top 3 states by the sum of sales, for the region they select, how would you give the filter options?  E.g.: If the user selected North East as the Region, the view should show the top 3 states in North East with highest total sales and like wise for each Region they select.