Francine currently has $45,000 in her 401k account at work, and plans to contribute $800 at the end of each month for the next 15 years. How much will she have in the account in 15 years, if the account averages a 6% annual return? Assume monthly compounding. 

For the $45,000 BEGINNING amount, use the FUTURE VALUE formula of $1: 
   , where:  = Accumulated amount, or future value (Unknown, in this case)
                             = Present Value||Principal invested||INITIAL amount deposited ($45,000, in this case)
                             = Annual Interest rate (6%, or .06, in this case)
                             = Number of ANNUAL compounding periods (Monthly, or 12, in this case)
                             = Time, in years (15, in this case)


For the monthly $800 contribution, use the formula for the FUTURE VALUE of an ORDINARY ANNUITY:
   , where:   is the future value in the amount of time (years), or the amount that will
                                                   be available then (UNKNOWN, in this case)
                                              is the payment amount ($800, in this case)
                                                is the interest rate, per year (6%, or .06, in this case)
                                                is the number of compounding periods per year (12, in this case)
                                                is the amount of time the money is invested (15, in this case)

You then ADD "A" to FVoa to get the amount in the account after 15 years.