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Invoicing Usage Summaries
A usage summary is invoiced independently from its parent order product. Both records have their own Next Billing Dates, allowing users to invoice them at the same time or to create different billing timeframes. You can use different billing timeframes to split your usage order product and its related usage summaries onto different invoices. Your ability to customize usage summary billing timeframes will vary based on whether you're pricing usage with price schedules or order product consumption schedules. (Salesforce Billing Managed Package)

