Independant-Comissioned Based Company

I have a new client that sell item for a parent company and recieves commission on the sales and would like to be able to track all sales and commision earned--this way he will have a good client base knowing what they have ordered in the past to help them to know what should be ordered in the future. The write the check to the parent company and my client forwards them with the his order. I am just not real sure how this should be set up to have a seamless flow in QB. I would appreciate any help on this matter I can get