Question 11 (1.5 points) Considering the DuPont model, how a start-up can improve its return on equity? You can assume that the company has a positive net income. You may choose more than one answer. Increasing the debt to asset ratio. Improving the operating income. Increasing the leverage. Increasing the sales revenue. Reducing the average total assets. Question 12 (2 points) Given the following data, what is the contribution margin? Gross margin = $500. COGS = $600. Fixed expenses = $100. Variable expenses = $300. Depreciation $100. = $800. $500. $600. $700. $0. -$100.