The formula is S = So(1 + I/n)nt
where S = total sum of money at the end of the time
So = the amount of money inititally deposited = $1000
I = annual interest rate = .02
n = number of periods per year = 4
t = number of years = 4
So, S = $1000(1 + .02/4)(4)(4) = $1083.07