Commission is calculated from the package pricing that salesmen take an advance payment from. The package Update after an advance payment does not belong to the salesman's commission unless the current package upgraded to a custom solution.
Closing a deal is the primary responsibility of the salesperson.
A salesperson is not eligible to receive a commission until the client has made the full payment.
If a partial payment has been made, you may request an advance from your commission.
For custom development projects—although the commission rate is lower than standard packages—commissions are calculated based on the final invoice. You may request the final invoice to confirm the total project value if needed.