Hi there! It sounds like you're having trouble formatting your cells to display the dollar sign. Don't worry, I can help you with that!

Here's a step-by-step guide to formatting your cells to display the dollar sign:

1. Select the entire column that you want to format.
2. Right-click on the selected cells and choose "Format Cells" from the drop-down menu.
3. In the "Format Cells" dialog box, click on the "Number" tab.
4. In the "Category" list, select "Currency".
5. Choose the desired currency symbol from the "Symbol" drop-down menu (in your case, it should be the dollar sign).
6. Set the number of decimal places you want to display (e.g. 2 for two decimal places).
7. Click "OK" to apply the formatting to the selected cells.

If the formatting still doesn't appear after following these steps, try pressing "F2" to edit the cell and then press "Enter" to confirm the change. This should force Excel to update the formatting.