You have purchased a $10,000 Face Value 20-year BBB rated (by S&P) with a 4.5% coupon (paid semi-annually), a Yield to Maturity (YTM) equal to 4.00% and a market price equal to 106.86% or ($10,686). When this bond matures in twenty years, what will the total final payment be by the corporate bond issuer? What is the final payment comprised of?