LAKE MEDICI SOFTWARE
    INVOICE                                       INVOICE #37-860516
    -------                                       ------------------

    BILL TO:
    --------
    Name    ________________________________________________________

    Company ________________________________________________________

    Address ________________________________________________________

            ________________________________________________________

    City, State, Zip _______________________________________________

           This invoice covers software already received by:

           Name ____________________________________________


    The per-copy (per machine) price for commercial and governmental
    organizations at one site reduces with volume as follows:

                 Copy Number                    Per-Copy Price

                  1 - 5                                $20
                  6 - 10                               $15
                  11 - 25                              $10
                  26 - 100                             $7
                  101 - infinite                       $5

    ------------------------------------------------------------------------
    Copy #         Description                           Unit Cost     Price
    ------------------------------------------------------------------------
                   PC-prompt V2.2
                   (Automatic DOS Help for the
                    IBM PC/XT/AT & Compatibles)

    1 - 5          Single User License                   $20.00     ________

    6 - 10         Single User License                   $15.00     ________

    11 - 25        Single User License                   $10.00     ________

    26 - 100       Single User License                   $ 7.00     ________

    101 - inf      Single User License                   $ 5.00     ________

                      MD Sales Tax if applicable ..................$________

    ------------------------------------------------------------------------

                   Please remit ------------->      Amount Due.....$________

    PLEASE REMIT PAYMENT TO:      Lake Medici Software
    ------------------------      17 Medici Court
                                  Baltimore, MD  21234