INVOICE

          Remit to:                               From:

          Sierra Consultants                      ________________________
          Joseph L. Cousins                       ________________________
          10118 Avenel Gardens Lane               ________________________
          Silver Spring, MD 20903-1735            ________________________
          (301) 439-2738                          ________________________

                                                  Contact Individual:

                                                  ________________________
                                                  ________________________


          Qty  Description                   Unit Price          Total
          ===  =======================       =============       =========

          ___  BIO-CAL Program               $ 25.00             _________
          ___  dLock/dUnLock for dBase       $ 20.00             _________
          ___  dLimited for dBase            $ 20.00             _________
          ___  B2Q (Basic to Quick)          $ 20.00             _________

                                             SubTotal            _________

          (Maryland residents only.......)   TAX                 _________

                                             Total               _________

          Size of DISKS to ship   5 1/4 [ ]    3 1/2 [ ]    DD [ ]  HD [ ]