Figure out what a rep earns in your industry (salary + commission), figure out how much time you want them to spend and what you think a good sales person will deliver each month/quarter/year and do the maths. You want to build in a risk premium. do that because the sales rep is closer to the customer than the company, and the rep should be able to make the call to drop the price to get the sale. However, there should be a G.P. rate 'floor,' below which the rep gets 0 commission.
When you log on to your WebEx service site, Productivity Tools are automatically installed on your desktop. If automatic installation is turned off on your WebEx service site, you can download them yourself. In the left navigation bar of your WebEx site, under Support, select Downloads.
WebEx publishes webinars using the .ARF file format. WebEx also offers a free Network Recording Player application that allows you to open and watch .ARF files on your computer. You may download and install the Network Recording Player application on your computer directly from the WebEx website. Go to the WebEx Play a Recording homepage.