Salesforce Billing is an add-on package that inherits key records and information from Salesforce CPQ. After a sales rep finalizes a quote and orders it within Salesforce CPQ, Salesforce Billing picks up the order record for invoicing, payment, and revenue recognition. Salesforce Billing provides several ways to automate subscription billing, usage-based product billing, milestone billing, and custom billing with recurring invoices. The invoice record represents one-time, recurring, and usage-based charges incurred over a period of time. 

We are cover the below topics:
1. Object Model of Salesforce Billing

2. Invoice Generation with CPQ Quotes

3. Invoice Data Flow

4. Billing Package Settings and Invoice Data Flow