At our local toyota dealership, while reviewing the cost sheet for the TRD sport package, there was an item that is not part of the package which according to the salesman is needed for the rear view camera. This item is listed as "DISPLAY AUDIO HD". The items dealer invoice and retail price is $520 and $615, respectively. Is he telling the truth? Thought the TRD package prices would include everything for the rear view camera. Would appreciate anyone's quick response as I hope to buy the truck soon. Thanks in advance.