Sausage and Chicken Gumbo

Name: Sausage and Chicken Gumbo
Ingredients: 3 lbs chicken preferably dark meat, bone-in; 2 tsp kosher salt or to taste; 2 tbsp black pepper; 2 tbsp white pepper; 1 tbsp ground mustard; 2 tbsp cayenne pepper; 2 tbsp paprika; 2 tbsp garlic powder; 1 tbsp filé powder optional; 2 tbsp Cajun seasoning to taste; 1.5 cups flour; 1.5 cups peanut oil or vegetalbe oil; 1 onion fine chop; 1 cup celery fine chop; 1 green pepper fine chop; 9 cups low sodium chicken broth; 1.5` lbs andouille sausage smoked; 1 bay leaf; 2 tbsp garlic minced; 1 lb shrimp (optional) peeled; 4 cups white rice