Sales commission and vendor commission

Hi, i need help with a tally prime entry.

Lets understand the business model.

1. My business sells services to clients and not a retail product.

2. I have got a sales person to make sales and get a percentage of 5 % on gross sale

3. I got another person/vendor who helps to complete the service on the sale made and receives 10% on gross sales.

4. How can i make an entry so that i can easily track things on tally based on sales commision due to be paid and vendor commission to be paid for each of the clients 

Thanks in advance