8-16. A woman desires to have $400,000 in a savings account when she retires in 20 years. Because of the effects of inflation on spending power, she stipulates that her future “nest egg” will be equivalent to $400,000 in today’s purchasing power. If the expected average inflation rate is 7% per year and the savings account earns 5% per year, what lump-sum amount of money should the woman deposit now in her savings account? (8.2)