An investor purchases a 1000 bond redeemable at par that pays semiannual coupons at a nominal rate of 8% compounded semiannually and matures in ten years. The bond will yield an annual rate of 7% convertible semiannually to maturity. If the bond is called in five years, immediately after the 10th coupon payment, the minimum redemption value the investor needs to realize the same yield would be X. Determine X.