Welcome to the Community, 98electric.
I'd be glad to help out with the report you're looking for, for invoices.
While there isn't a report that matches exactly what you described, I recommend trying the Sales by Item Detail Report. This can be done by:
1. Clicking the Reports tab at the top of the page.
2. Hover over Sales and select Sales by Item Detail.
From here, you'll be able to click the invoices in the report to view the items included. It may also be a good idea to consult your accountant about the best practice regarding billable expenses.
I'll be here if you have any other questions.