How to Nest Subtotals in Excel 2003

1. Click and drag your mouse to highlight the three columns---two columns of headings and the third of values.
2. Click the toolbar's 'sort' button. The Sort window will open.
3. Sort the table first by the first column and then by the second column.
4. Click 'Subtotals' from the Data menu.
5. Click the down-arrow in the 'At each change in' drop-down box. Click the first column's heading.
6. Click 'Sum' in the 'Use function' box.
7. Click the down-arrow in the 'Add subtotal to:' drop-down box. Click the third column's heading.
8. Click 'OK.'
9. Click and drag your mouse to highlight the three columns again. Click 'Subtotals' from the Data menu.
10. Click the down-arrow in the 'At each change in' drop-down box. Click the second column's heading.
11. Click 'Sum' in the 'Use function' box.
12. Click the down-arrow in the 'Add subtotal to:' drop-down box. Click the third column's heading.
13. Uncheck the 'Replace current subtotals' box.
14. Click 'OK.'