If my companies information from last year was:

operating income $34,500

Sales were $54,000

Operating assets, at the beginning of the year was $68,000

Operating assets, end of year $71,000

1) How do I calculate and interpret the margin component of the expanded ROI formula?

2) How do I calculate and interpret the turnover component of the expanded ROI formula?

3) How do I calculate the ROI using the margin and turnover from the above calculations? How do I know if the ROI is acceptable?