Asterisk Trixbox Display Live Calls

We have Trixbox CE 2.4 in our organization. We have a sales department that is responsible for making sales calls. We are looking for a way to have their live call volume displayed like a graph. For example, each chosen sales associate will be listed on the screen, with the number of calls they have made so far that day. The "live" list could update every few minutes to stay current. We will show this display on an LCD television on the sales floor to create a competitive environment and motivate each sales person to make more calls. A custom or modified script that can accomplish this is required. We need to be able to choose what extensions we want displayed and have a nice pretty interface simply showing that days call volume for each person.