A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
If you refer a cell A1 from other cell C1, you can insert rows formula will adjust. But if you use cell Address A1:C10, say for SUM and then insert a column within A:C, excel will adjust cells to A1:D10 but if you insert after A:C, excel will not adjust.
Say you have used column B1:Z25 and total in AA then it will not work. Best is keep one column blank. In This case put formula As B1:AA25 in AB column. The Column AA will remain blank. Now when you want inserting column, do that by selecting AA column. The formula will adjust