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Calculator commands for the TI-73 for the annuity:

Go to PRGM, then NEW:

    Name =              (use the TEXT menu to type in a name)

    :Disp "Monthly Principal                 (Disp in under the PRGM key, I/O options)
    :Input P                                             (Input is under the PRGM key, I/O options)
    :Disp "Interest Rate
    :Input R
    :Disp "Time (years)
    :Input T
    :P*((1 + R/1200)^(12*T) - 1)/(R/1200) -> A  (->  is the STO ->  key)
    :Disp "Total
    :Disp A
    :Pause
    :Stop

        This program calculates how much a regular deposit is worth after continuously putting in so much money.  The principal is monthly, although I hope to change it to do weekly or yearly as well.  The interest rate is put in as a percent, not as its decimal equivalent (6% is inputted as 6, not as 0.06). 

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