sales dept pricing

What pricing labor rate is typically used for used and new car sales department work. I am being told to use a discounted below cust pay rate which I don't believe truly represents our cost of doing business.
Cost plus 0% - 15% | 3% |
Cost plus 16% - 40% | 11% |
Cost plus 41% - 100% | 6% |
Retail minus 26% - 50% | 6% |
Retail minus 5% - 25% | 18% |
Full Retail Rates | 53% |
Other | 3% |
[This message has been edited by robc (edited 07-08-2005).]