Posters.com is a small Internet retailer of high$-$quality posters. The company has $$710,000$ in operating assets and fixed expenses of $$155,000$ per year. With this level of operating assets and fixed expenses, the company can support sales of up to $$5,100,000$ per year. The company$$s contribution margin ratio is $10\%,$ which means that an additional dollar of sales results in additional contribution margin, and net operating income, of $10$ 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?