1. Mr. Jones bought a building for $60,000, payable on the following terms: a $10,000 down payment and 25 equal annual installment payments to include principal and interest of 10 percent per annum. Calculate the amount of the installment payments. How much of the first year's payment goes toward reducing the principal amount?
2. A firm purchases 100 acres of land for $200,000 and agrees to remit 20 equal annual end-of-year installments of $41,067 each. What is the true annual interest rate on this loan?
3. Susan Robinson is planning for her retirement. She is 30 years old today and would like to have $600,000 when she turns 55. She estimates that she will be able to earn a 9 percent rate of return on her retirement investments over time; she wants to set aside a constant amount of money every year (at the end of the year) to help achieve her objective. How much money must Robinson invest at the end of each of the next 25 years to realize her goal of $600,000 at the end of that time?