Bill's bakery specializes in baking donuts and muffins. Bill only has 80 minutes to prepare the dough for the donuts and muffins. It takes him 5 minutes to prepare the dough for one dozen donuts and 8 minutes to prepare the dough for one dozen muffins. Bill needs to make at least 13 dozen donuts and muffins together. The bakery earns a profit of $3.00 per dozen donuts and $5.00 per dozen muffins. How many dozen donuts and muffins should he bake to maximize his profit?​