I have a hidden column with the =TODAY() function. I am counting days from the time an order was placed to the delivery date. Once the delivery date is entered into a column, I want the column counting the days to stop. What would be the correct formula for that? I'm curing using =IF(C6="","OPEN",N6-C6). C6 is the delivery date & N6 is the hidden today function. The O column is the column showing the number of days.