Final answer:
The debt ratio cannot be calculated based on the information provided.
Step-by-step explanation:
The debt ratio represents the proportion of a company's total assets that are financed by debt. It is calculated by dividing the company's total debt by its total assets. In this case, Duborn Supplies' total assets are $107 million. To find the debt ratio, we need to determine the total debt. Since the question does not provide information on the specific amount of debt, we cannot calculate the debt ratio.