why are we using the Present value formula and not the future value formula?

2. On Abby Ellen's graduation from law school, Abby's uncle, Bull Brady, promised her a gift of $24,000 or $2,400 every quarter for the next 4 years after graduating from law school. If the money could be invested at 6% compounded quarterly, which offer should Abby choose? [[LU 16periods,=1%46%21PVoa=$2,400[(1(1/(1+.015)16))/.015]=$33,91