I have been struggling trying to figure out how to plot these on a graphing calculator. I've been out of school for a while and can't even remember for sure which class this was covered in, but I believe it was way back in pre-calculus.

In comparing IRA options, I'm looking at one with a higher interest rate (5.6%) that is taken out of each contribution as a one-time fee vs. a lower rate (.5%) taken as a compounding fee, ie charged repeatedly on the increasing balance. How do I plot the cost over time of each simultaneously to determine the point at which the lower interest rate costs more?