I have very strong feelings on this subject as an employer who pays commission to the sales people in my store. Customers should never be concerned about commission. That's an internal thing. The bottom line is that customers are buying merchandise from the store, not the sales person. If the employees value their jobs, (especially in this economy), they'll all work together to ensure the best customer service which will lead to the most sales which helps ensure that their employer stays in business which ensures that the sales people can stay employed and ensures that customers have a place to return to for service and future purchases. A customer's job is to enjoy their purchases, NOT worry about who gets commission on what they buy!