A client needs to save $12000 dollars in 6 years. If they invest at $LaTeX: \displaystyle 2.1$ % compounded monthly, how much do they need to invest today?

Using the forumla for present value $LaTeX: \displaystyle PV = \frac{12000}{ (1 + (0.021/12))^{72} } = 10580.54$ dollars.