Commission

Definition1:

The fee paid for a service, often based on results or on a percentage of the sales or profits.

Definition2:

A committee (often official) dedicated to a specific aspect of business.

Examples:

The sales force is paid a commission based on the gross amount of their sales, so they are greatly motivated to make as many big sales as possible.

Because that company supply services to the county, they often have to provide reports to the County Commission to justify their invoices.