A = P x (1 + r)^n
A = ending balance
P = starting balance (or principal)
r = interest rate per period as a decimal (for example, 2% becomes 0.02)
n = the number of time periods
e.g. P=$1000, r=1% or 0.01, n = 10 years or 120 months
A = 1000*(1+0.01)^120 = $3300