In the city of Urbextorto, the sales tax is 25%. A certain clothing store in the city is currently giving an n% discount on all items, and n is special in that, after both the sales tax and discount are applied, a $20 shirt ends up costing $20. Find the value of n.<spanclass=′latex−bold′>(A)</span>5<spanclass=′latex−bold′>(B)</span>10<spanclass=′latex−bold′>(C)</span>20<spanclass=′latex−bold′>(D)</span>25<spanclass=′latex−bold′>(E)</span>50