Can you help me with this exercise?

On January 1, 20X1, Matthers Co. issued eight-year bonds with a face value of $500,000 and a stated interest rate of 8%, payable semiannually on June 30 and December 31. The bonds were sold to yield 6%. Table values are: Present value of 1 for 8 periods at % .............................................. .627 Present value of l for 8 periods at 8% .............................................. .540 Present value of l for 16 periods at 3% ............................................ .623 Present value of l for 16 periods at 4% ............................................ .534 Present value of anmiity for 8 periods at 6% .................................... 6.210 Present value of annuity for 8 periods at 8% .................................... 5.747 Present value of annuity for 16 periods at 3% .................................. 12.561 Present value of annuity for 16 periods at 4% .................................. 11.652 The present value of the principal is