Revenue from gas wells that have been in production for at least 5 years tends to follow a decreasing geometric gradient. One particular rights holder received royalties of $4000 per year for years 1 through 6; however, beginning in year 7, income decreased by 15% per year each year through year 14. Calculate the future value in year 14 of the royalty income from the wells provided all of it was invested at 10% per year.