There should be one of these sheets for each month.
I set these sheets up with the individual invoice numbers
across the top and the rows as follows:

Rate Charged
Paid Miles
Total Miles
Company
Date Finished
Date Paid
Projected Income
Actual Income
Total Outstanding Invoices
Commission Payable To
Commission Amount Due
Commission Amount Paid
Comments

The total outstanding from each month is carried over to the next month.
The payments are also listed on the

PAYMENT SHEET

This sheet shows:
What you have coming in
What is overdue
How much income you generated for any given month.