How much will Jane have in her retirement account immediately after she makes her last contribution in Year 40, assuming a return on her investments of 9%?

Using the equation PV = FV / (1+r)^n, Jane will have $405,717.21 in her retirement account after she makes her last contribution in Year 40. The equation takes into account the cumulative effect of interest that is earned each year on the balance and contributions over time.

Assuming a return on investments of 9%, Jane will accumulate an additional $122,398.37 for a total of $528115.58 if she resumes contributing immediately following college graduation (This assumes no other changes to any other variables). This amount is calculated using the same equation as before taking into account both her contributions along with any accrued interest from years 19 through 40.