Adrian $(53)$ purchasd a $$10,000,13-$week treasury bill as a short$-$term investment. He paid $$9,960$ for the security, which was issued on July $17,2023.$ When the bill matured on October $16,2023,$ Adrian received $$10,000.$ How is the $$40$ in interest that he erned on this investment reprted on his return?