Trying to use Billiable Expenses for Do

I have a client in the building industry that charges majority of his clients on a do and charge basis which can include up to 50 individual charges each progress claim per fortnight.

I have looked at using the billable expenses feature however I have noticed that it brings all the expenses in as a separate line item which we don't want to do as the progress claim and we also need to add our markup onto the invoice.

Is there a way that I can import the billable expenses invoices and then convert them to one line in my invoice?

At the moment I am double handling by entering them into an excel spreadsheet and also into Quickbooks so any help would be appreciated.