90. Cosmos Touring wishes to replace its luxury bus in 10 years by accumulating funds in a special
account. The new bus is expected to cost $180,000. How much must Cosmos put into the fund in
equal, end-of-year amounts if earnings are expected to be 8% for the first 4 years and 10% thereafter?
91. Al Corbin is 25 years old today and he wishes to accumulate enough money over the next 35 years to
provide for a 20-year retirement annuity of $100,000 at the beginning of each year, starting with his
60th birthday. He can save $2,000 at the end of each of the next 10 years and $3,000 each year for the
following 10 years. How much must he save each year at the end of years 21 through 35 to obtain his
goal? Assume that the average rate of return over the entire period will be 10%.
92. If a 16-year-old high school student put $2,000 at the end of each year for 4 years into an IRA that
earned a rate of 9%, how much would she have accumulated by age 65? Assume funds are left to
accumulate for 45 years (age 20 – 65) at 9%.