I change data elsewhere? I manage my bank book in Excel. I have the obvious row for adding new expenses, a row for deposits, and a row that sums them up. It always used to automatically calculate the sum after I typed in new information, or changed old information, but now I type something new in and the sum doesn't change. I have to double click the cell to call up the forumla, then press enter for it to recalculate. What is causing this? How do I fix it?