Deploying BESR & DLO

   I have 2 servers & numerous workstations that require disaster recovery.  What do I have to buy?
    *  2 BESR licenses & 10 DLO licenses
    *  1 BESR license, 1 server agent & 10 DLO agents
 or do I need to buy BE 11d with 11 BESR/DLO options