Payments of 10,000 will be made to you and then invested into a fund at the beginning of each year, for the next 20 years. These payments will earn a 7% annual effective rate, and interest payments will be immediately reinvested into a second account earning a 4% effective annual rate. Find the purchase price of this investment opportunity, given that it has an annual yield of 6% over the 20-year life of the investment. (please answer without using excel and only formulas)