You want to invest as you grow older. You will invest 20 at the end of the first year, 40 at the end of the second year, 60 at the end of the third year, and so on until the end of the 10th year. The investments earn interest at an effective rate of 12%, and the interest payments are reinvested at an effective rate of 15%. Find the total accumulation value you will have after 10 years. (please don't answer with excel)