Suppose that you invest $PMT into your retirement account for 30 years at an average monthly APR of 12.5% (very possible with mutual funds, stocks, and the correct portfolio balance). Once you retire, you move your lump sum of money into a low risk account offering you an average yield of 2.5% APR compounded monthly.

How big should PMT be so that you can withdraw $2,000 from your retirement account (upon retiring) without the account ever depleting?