Gates Bar-B-Q sauce

Gates is one the oldest Kansas City barbecue joints. Their original sauce is tomatoey, thin yet quite pronounced in vinegar, celery seed and chili powder. What follows is my attempt to copy it faithfully. http://www.gatesbbq.com

Label contents
"Tomatoes, vinegar, salt, sugar, celery, garlic, spices, and pepper. 1/10 of 1% potassium sorbate preservative added."
16 oz tomato sauce
1/2 cup cider vinegar
1/4 cup white sugar
1 1/2 Tsp ground cayenne pepper
1 1/2 Tsp ground cumin
1 1/2 Tsp celery seed
1 Tsp garlic powder
3/4 Tsp chili powder
salt to taste
Combine the above ingredients into a non-reactive sauce-pan. Bring to a boil, stir, then cut off the heat. This sauce is meant to be thin. Good with smoked ribs and brisket.