please answer it manually with formula, not by excel.

A university estimates that its new campus centre will require $30 000 for upkeep at the end of each year for the next 5 years and $50 000 at the end of each year thereafter indefinitely. If money is worth i (1) = 8%, how large an endowment is necessary for the future upkeep of the campus centre?

11. A university estimates that its new campus centre will require $30 000 for upkeep at the end of each year for the next 5 years and $50 000 at the end of each year thereafter indefinitely. If money is worth (1) = 8%, how large an endowment is necessary for the future upkeep of the campus centre