A 10-year 8% Treasury bond has duration equal to 6 years when the market yield is 17.10% p.a. compounded half-yearly. The bonds price at this yield is $57.110 (per $100 face value). Use the bonds duration to estimate its price (per $100 face value, rounded to 3 decimal places) at a market yield of 17.09% p.a. compounded half-yearly