If you want to change only the display and not use a formula or an extra cell
then select the "CD" in the formula bar and change the font color to match
the background color.
1. Select the cell, and press F2 - Edit mode.
2. Highlight the cell content.
3. Do one of the following:
On the Formatting toolbar, click the Font color icon and select the white
color from the Font color icon list.
-or-
1. On the Format menu, click Cells. The Format cells dialog bos is displayed.
2. In the Color list, select the white color.
3. Click OK, to save the settings and return to the worksheet.