A petroleum engineer estimates that the present production of 400,000 barrels of oil during this year from a group of 10 wells will decrease at the rate of 15% per year for years 2 through 10. Oil is estimated to be worth $25 per barrel. If the interest rate is 10% compounded annually, what is the equivalent present amount of the prospective future receipts from the wells?

Please show work, equations used. No table