Can someone please HELP. I keep get #'s myself and by others that are off by thousands.

For each of the following?cases, find the present value at time zero at the given nominal interest rate.

Number of Compounding Nominal Periods in FV Interest Deposit Present the Year (m) Deposit ($) Rate (%) Periods (Yrs) Value ($) 400 18 8 2 900 21 12 600 On CO 4 Number of Compounding Nominal Periods in FV Interest Deposit Present the Year (m) Deposit ($) Rate (%) Periods (Yrs) Value ($) 400 18 8 (Round to the nearest cent.)