Whats the easiest way to add unbilled charges for a customer to an invoice?

• Run a Profit & Loss by Customer report, drill down on the expenses for this customer, and copy them onto the invoice

• Find a previous invoice with unbilled charges and copy it

• Run the Unbilled Charges report and manually copy charges for this customer onto the invoice

• Add them from the drawer on the right-hand side of the invoice

• Filter the money bar for Unbilled activity in the Sales Center and manually copy charges for this customer onto the invoice