You have been given the chance to live an eternal life. With this in mind, you want to invest $1000 per year with an associated interest rate of 6%. You want to continue to invest forever. Determine the present value of your investment.

It's either using the capital recovery factor (CRF) formula, compound amount factor (CAF) formula, sinking fund factor (SFF) formula, or the present worth factor formula (PWF). I don't know which one to use for this scenario. Or if I have to use a different formula from these ones.