I have a feeling that this is a simple thing...yet I have spent too much time
already trying to figure out this "simple" thing.

I have a simple purchase order document set up in Excel 2007. I have a
formula in the total cost column that essentially multiples the quantity by
the unit cost. I would like the total cost cell for each item to appear
blank (yet not remove the formula) if there is nothing entered into the cell
for that particular row; however, now, if there is no quantity or unit price
entered, the result shows as "0.00." How do I change that view...I can't get
those zeros to disappear without deleting the formula as well.

Thanks!