A manager is holding a $21 million bond portfolio with a modified duration of 9 years. She would like to hedge the risk of the portfolio by short-selling Treasury bonds. The modified duration of T-bonds is 11 years. How many dollars' worth of T-bonds should she sell to minimize the variance of her position? (Round your answer to the nearest dollar amount. Omit the "$" sign in your response.) Dollars' worth of T-bonds to be sold