A Best-selling author decides to cash in on her latest novel by selling the rig

A Best-selling author decides to cash in on her latest novel by selling the rights to the books royalties for the next six years to an investor. Royalty payments arrive once per year starting one year from now. In the first year the author expects $400000 in royalties followed by $30000 then $100000 then $10000 in the three subsequent years. If the investor purchasing the rights to royalties requires a return of 7% per year what should the investor pay?