what am I doing wrong? the first one is right but when I do the same thibg to the second question (4416.42) it says it is wrong

Bond prices. Price the bonds from the following table with monthly coupon payments: . Hint: make sure to round all intermediate calculations to at least seven decimal places. a. Find the price for the bond in the following table: (Round to the nearest cent.) Years to Yield to Function Arguments Par Value Coupon Rate Maturity Maturity Price $5,000.00 9% 6% $ 6744.76 Rate 0.0083333 0.0083333 Nper 450 = 450 b. Find the price for the bond in the following table: (Round to the nearest cent.) Pmt 37.5 37.5 Years to Yield to 1000 1000 Par Value Coupon Rate Maturity Maturity Price Type O = 0 $1,000.00 7% 10% $ 4416.42 -4416.415201 Returns the present value of an investment: the total amount that a series of future payments is worth now. Rate is the interest rate per period. For example, use 6%/4 for quarterly payments at 6% APR. Enter your answer in the answer box and then click Check Answer. Formula result = -4416.415201 OK Cancel