$($Total $15$ points$)$

Suppose we require a $10\%$ return on new investments. We have an investment that costs $$300$ and has cash flows of $$100$ per year for five years. To get the discounted payback, we have to discount each cash flow at $10\%$ and then start adding them.

$\backslash$table$[[$Year$,\backslash$table$[[$Cash Flow$],[$Undiscounted$]],\backslash$table$[[$Cash Flow$],[$Discounted$]],\backslash$table$[[$Accumulated$],[$Cash Flow$],[$Undiscounted$]],\backslash$table$[[$Accumulated$],[$Cash Flow$],[$discounted$]]],[1,$$$100,$$$,$$$100,$$$$