Response to the following problem:
Nucor, a steel manufacturer, reported net income for 2008 of $1,831 million on sales of $23,663 million. Interest expense for 2008 was $135 million, and minority interest was $314 million for 2008. The income tax rate is 35 percent. Total assets were $9,826 million at the beginning of 2008 and $13,874 million at the end of 2008.
Compute the rate of ROA for 2008 and disaggregate ROA into profit margin for ROA and asset turnover components.