Here is the first assignment for MS Excel- Help please!

Create a data table that shows the future value and percentage of tuition saved for a fictional college fund. Interest rate on account is 4.5%,compounded monthly. tuition is $40,000 annually, Npr= 15*12,PMT=375, percentage of tuition saved = FV/tuition for four years. The data table should show the future value and percentage of tuition saved for monthly payments from $250 to $850 in $50 increments.
Seems that when I fill in the values for the FV formula it only shows the formula itself rather than a value in the table. Thanks in advance for any help!