Invoices
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An invoice represents the revenue and accounts receivable at the contract level. At a high level, these are calculated by aggregating line items within the same period (start and end date) and invoice delivery window. Invoices are typically stored in the destination for record keeping and business administration requirements (billing, accounting, etc).

Diagram
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.. figure:: /_static/images/erd/invoices_erd.svg
    :width: 300px


Table description
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.. csv-table::
   :file: /_static/ex_tables/invoices_col_desc.csv
   :delim: tab
   :class: bmodel-table
   :header-rows: 1