To save for retirement Simon invests $$150$ each month in an ordinary annuity with a $3\mathrm{.}3\%$ interest rate compounded monthly. Determine the accumulated amount in Simon$$s annuity after $40$ years

p$=150$

r$=\mathrm{.}033$

n$=12$

t$=40$

$150[(1+\mathrm{.}033/12)^12*40-1]/\mathrm{.}033/12$

ans$=149,271\mathrm{.}58$