It sounds like the shading may not be set to print in the spreadsheet. Here are the steps to check and adjust the print settings for shading:

1. Select the cells that are shaded and not printing properly.
2. Right-click on the selected cells and choose "Format Cells" from the menu.
3. In the Format Cells dialog box, click on the "Fill" tab.
4. Make sure the "Background color" option is set to the desired shading color.
5. Check the "Print" box to ensure that the shading will be printed.
6. Click "OK" to save the changes.

If the above steps do not work, you can also try adjusting the print settings for the entire spreadsheet:

1. Click on the "File" tab in Excel.
2. Click on "Print" in the left-hand menu.
3. In the "Settings" section, click on "Page Setup."
4. In the Page Setup dialog box, click on the "Sheet" tab.
5. Check the box next to "Print" under the "Gridlines" and "Black and white" sections.
6. Check the box next to "Print" under the "Cell errors" section if there are any error messages in the shaded cells.
7. Click "OK" to save the changes.

Hopefully, one of these solutions will fix the issue and allow the shaded cells to print properly.