A repeating situation for us:
Our customer asks our employee to travel to their site. Employee pays all travel expenses personally and then give us a reimbursement form. We reimburse the employee and invoice the customer for the costs.
In the books we start with “Expense Claim”. Account=“Billable expenses” Description=“Personal Mileage”. Invoice=“uninvoiced”, Qty = 100, unit price=0.655 (the government determined rate).
Then in “Customers” I select the “uninvoiced” dollar amount to create a new invoice. The number of miles and the rate charged for those miles are no longer available as it has combined them into a single number.