Consider an investor who purchases a Treasury inflation-indexed note with an original principal amount of $100,000, a 5.500 percent annual coupon rate (coupon is paid semiannually), and 10 years to maturity. The semiannual inflation rate during the 6 months ending 3 months before the first coupon payment (the 3-month lag is necessary to allow for the release of the official CPI figures) is 1.21 percent. Calculate the adjusted principal amount for the first coupon payment.