Jan 1, 2020, purchased for $409,686 a 7.5% bond that matures in 5years, when the market interest rate was 7.1%. Interest is paid semiannually beginning June 30,2017. Plan to hold this investment till...

Jan 1, 2020, purchased for $409,686 a 7.5% bond that matures in 5years, when the market interest rate was 7.1%. Interest is paid semiannually beginning June 30,2017. Plan to hold this investment till maturity.  What is the Face Value of this bond? Please show the complete calculations with all the steps.  I have the answer with me but I don't know how the answer was arrived at. THANKS