Calculate the ROI

During the year, the division had $14,000 of net operating income on sales of $450,000.
I. What is the ROI of the division?
II. If sales were $600,000 and net operating income was $30,000 and operating assets at the end of the year were $350,000, what would ROI be? For problems, be sure to answer all questions and provide all requested information. Your response should be at least 75 words in length.