What type of item does Xero add to the invoiced total in your project?

In Xero's project management feature, the invoiced total is calculated based on the total of all items that are assigned to that particular project. This includes any services or products that have been billed to clients specifically for that project. This comprehensive approach ensures that the final invoice accurately reflects all the billable work and materials provided, allowing for consistent financial tracking and reporting.

Delivery charges, discounted items, and late fees can all be relevant in the context of invoicing, but they do not encompass the totality of items involved in a specific project. Each of those categories might affect the invoice differently, but they are not what determines the invoiced total uniquely for projects. Therefore, considering the way Xero aggregates invoice amounts, the correct answer focuses on the totality of items served under the project.