A summary of your invoices and variations can be printed/emailed to anyone at any point through the job, even before the estimate has been accepted. See below for the two ways of doing this.
In the job click on "Invoicing" click on the cog in the top right, and choose "Print Invoice Statement" or ''Email Invoice Statement" from the menu.
Attaching to emailed invoices
When emailing an invoice you are able to use the icons to the left of each invoice to choose to add the invoice statement.