4:  Recipient:   %FirstName% %LastName% %CompanyName% %CompanyPhone% %CustomerEmail%
6:  Generated:   %RandomInvoiceNumber% %RandomTotal% %RandomShippingCharge% %RandomName%
7:  Configured:  %InvoiceDate% %DueDate% %CompanyPhone%
8:  System:      %UnsubscribeLink%
21:    "FirstName", "LastName", "CompanyName", "CompanyPhone", "CustomerEmail", "Email",
22:    "RandomInvoiceNumber", "RandomTotal", "RandomShippingCharge", "RandomName",
23:    "InvoiceDate", "DueDate", "UnsubscribeLink",
164:            if var in ("RandomInvoiceNumber", "RandomTotal", "RandomShippingCharge", "RandomName",
165:                       "InvoiceDate", "DueDate", "UnsubscribeLink", "CompanyPhone"):
185:            "RandomInvoiceNumber": generated.invoice_number,
186:            "RandomTotal": f"${generated.amount:,.2f}" if generated.amount is not None else None,
187:            "RandomShippingCharge": f"${generated.shipping:,.2f}" if generated.shipping is not None else None,
188:            "RandomName": generated.random_name,
189:            "InvoiceDate": generated.invoice_date,
190:            "DueDate": generated.due_date,
192:            "UnsubscribeLink": extra.get("unsubscribe_link", ""),