My formulas are not calculating at all on my spread sheets. In the past I was able to create a formula in one cell then click and drag the formula down the column and it would automatically calculate the formulas correctly. In the past week it has not been working. When I try to click and drag the formula down the column it copies the correct formula, but it does not calculate correctly. It has the correct formula in the formula bar but it does not calculate. The only option I have found that works is to select the cell, hit F2, and hit enter. This is not occuring on my spread sheets only, I have talked to many co-workers and they are having the same problem.