One Contract multiple contract lines, each line link to a project and need one billing invoice.

Summary:

We have a scenario where one customer will have one contract with multiple projects underneath. The requirement is to create one billing invoice. Please suggest what invoice format I need to select?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):