At a certain interest rate the present value of the following two payment streams are equal (i) 200 at the end of 5 years plus 500 at the end of 10 years )400.94 at the end of 5 years At the same interest rate, 100 invested now plus 120 invested at the end of 5 years wll accumulate to X at the end of 10 years. Calculate X. Round your answer to the nearest whole number