. Mrs. Bouchard is trying to decide when to retire. Her social security benefits will be $1,500 per month in retirement. Lets suppose that she could start receiving these benefits today. How much would she need to have saved up in order to receive a monthly income of $4,000? Use an inflation-adjusted discount rate of 13% and assume that she needs this monthly income for the next 35 years. N I/Y PV PMT FV