The newest project makes me difficulties. I feel not like the most qualified person for it, quite the opposite in truth. But to my bad luck I am the (almost) only one available. So far I have hardly done anything with Excel, especially not programming it. My knowledge of it is a few years old and rather dusty. That's the only explanation I can give why I have so much trouble with something what should be a fairly standard formula. I have to get it right tomorrow or I am in really deep trouble.