please explain your answer step by step

Posters.com is a small Internet retailer of high-quality posters. The company has $740,000 in operating assets and fixed expenses of $169,000 per year. With this level of operating assets and fixed expenses, the company can support sales of up to $5,000,000 per year. The company's contribution margin ratio is 9%, which means that an additional dollar of sales results in additional contribution margin, and net operating income, of 9 cents. Required: 1. Complete the following table showing the relation between sales and return on investment (ROI). 2. What happens to the company's return on investment (ROI) as sales increase? Complete this question by entering your answers in the tabs below. Required 1 Required 2 Complete the following table showing the relation between sales and return on investment (ROI). (Round your percentage answers to 2 decimal places.) Sales Net Operating ROI Average Operating Assets Income % $ 4,500,000 $ 236,000 $ 740,000 $ 4,600,000 $ 740,000 $ 4,700,000 $ 740,000 $ 4,800,000 $ 740,000 $ 4,900,000 $ 740,000 $5,000,000 740,000 $ % % % % % % Complete this question by entering your answers in the tabs below. Required 1 Required 2 What happens to the company's return on investment (ROI) as sales increase? Oincreases Decreases