During the second year of Bs ownership of Whiteacre, a huge oil strike is made within a few miles of Whiteacre. Local property values shoot up. With Whiteacre now having an estimated value of $300,000, B takes out (again from ABC Bank) a second nonrecourse mortgage on Whiteacre--for $50,000--which she uses to purchase for cash another property, Blueacre, located in another state. No other events occur. What is Bs basis in Whiteacre at the end of the second year?