By default all cells on a sheet are locked when you protect the sheet.

Best is to select all cells by CTRL + a and unlock all by going to
FormatcellsProtection Tab.

Then select those cells which you want locked(formula cells) and set them to
locked.

Now protect the sheet. Users can edit unlocked cells.

See options for allowables when go to ToolsProtect Sheet


Gord Dibben MS Excel MVP

On Fri, 19 Mar 2010 15:04:01 -0700, Dan
wrote:

Making an excel sheet so formulas can not be deleted in the sum total yet in
the other cells used to add up to the sum total cell a numer can be added.

I tryed locking only the cells that contain the formula under the Format
Protect tab, but the formula could still be deleted by hitting the space bar
or entering a number.

Once a sheet is protected no numbers can be added into the cells adding up
to the sum total cell.

Not a PC wise person so a answer in easy english is best.
Dan