The Period Billing Module is another optional module you can purchase and integrate into Miracle Service. This module allows you to set up the automatic creation of service contract bills, and automatically calculate charges for contracts invoiced over a specified period. To provide a higher level of accuracy in your equipment profitability calculations, the Master Service Contract Module will use periodic billing invoices in it’s calculations. This module gives you the flexibility to bill meter and equipment charges together or separately. Finally, this product can create invoices for master service contracts, allowing you to create one invoice for dozens of machines under the same service contract.