I am using Excel 2003 and am having a hard time doing a seemingly simple task... I have seen many formulas in 2007 up that are easy...why not 2003
All I want to do is to sum the values in one column but only the first/unique instance of items in another column (ignoring blanks)
As you can see below, there are occasionally duplicate cheque numbers and blanks, but I want to only sum the unique ones at the bottom in a "Totals" cell.