This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
Let's say you have employees who receive a 5% commission on all sales, but no other compensation.
On the Assumptions/Costs/Commissions page, you should enter 5% for all products in all markets. <php>echo $conf['comp_name'];</php> does not care which of your employees receives these commissions; from a planning perspective, all we care about is that 5% of the revenue will be "spent" by your company for commissions.
Employee tax and benefits will be automatically added to these commissions by <php>echo $conf['comp_name'];</php>. You can set the rates for taxes and benefits on the Payroll tab of the Assumptions/Personnel page. If the employees receive no salary except for the commission, you should still enter them as employees on the Employees tab of the Assumptions/Personnel page - with a zero salary. That's because some of <php>echo $conf['comp_name'];</php>'s calculations use the "number of employees" as part of those calculations.
Related Questions:
How do I add or change employees?
How do I change the number of employees?
How do I change the salary of an employee?