An array of invoice line item information. The maximum items for an invoice is 100.
unit_amountobject<money>Requiredcurrency_codestring<currency_code>RequiredvaluestringRequiredtaxobject<tax>Optionalpercentstring<percentage>Requiredamountobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequireditem_datestring<date_no_time>Optionaldiscountobject<discount>Optionalpercentstring<percentage>Optionalamountobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredunit_of_measureenum<unit_of_measure>Optional