This is a standard installation, with no customization, of SAP Hybris Commerce recipe "sap_aom_som_b2b_b2c" (Asynchronous and synchronous order management for B2B and B2C scenarios with SAP ERP). The system also contains a standalone installation of Data Hub, which is integrated with SAP Hybris Commerce. The database used for both Data Hub and SAP Hybris Commerce is SAP HAHA and is sitting on the same server.
You will have to pay for the Amazon EC2 infrastructure, which is around 4 USD per hour depending on the VM sizes when the system is running. Remember that you have control when the system is running and when not.