Miguel purchases a $21,0000 8% fifteen-year par-value bond having annual coupons for a price to provide a 6% annual yield if the bond is held to maturity. Five years later, just after the receipt of the fifth coupon, he sells it at a price to provide the new purchaser a yield to maturity of 7%. Find the difference between Miguel's book value B and the invoice price. (Round your answer to the nearest cent.) $ What was Miguel's actual yield for the five-year period? (Round your answer to three decimal places.)