Deposits made is $250, it is called Present value P = 250
Rate of interest r = 6% = 0.06
Time n = 12 years, 12 payments
Investment value after n years FV = FV = P *(1+r) *(((1+r) ^ n) – 1)/r
FV = 250 * (1 + 0.06) * (((1 + 0.06)^12) - 1)/0.06
FV = 250 * 1.06 * (((1.06)^12) - 1)/0.06 => FV = 250 * 1.06 * (2.012 - 1)/0.06
FV = 250 * 1.06 * 1.012/0.06 => FV = 250 * 1.06 * 16.87
FV = 250 * 17.88 => FV = 4470.5
So the final value of investment after 12 years is $4470.5.