so I'm having troubles with number 4-104 but for number 2 in the second handout

the answer is 256407 but I don't know how they got that answer

6 years, starting 12 years from now. The interest rate remains constant over this entire period of time. (4.15) 4-104. To pay off $50,000,000 worth of new construction bonds when they come due in 20 years, a water municipality must deposit money into a sinking fund. Payments to the fund will be made quarterly, starting three months from now. If the interest rate for the sinking fund is 8%, compounded quarterly how much b will each deposit be? (4.15) 4-105. An automobile salesperson states that hin