Can you show the steps for the calculations please, thank you.

The balance sheet for the New Products Division of NuBone Corporation showed invested assets of $200,000 at the beginning of the year and $300,000 at the end of the year. During the year, the division's operating income was $12, 500 on sales of $500,000. Compute the division's residual income if the desired ROI is 6 percent. Compute the following performance measures for the division: (a) profit margin, (b) asset turnover, and (c) return on investment