Here is the function:
=SUMIFS(Amount:Amount, Date:Date, YEAR(@cell) = Year@row, Date:Date, MONTH(@cell) = CurrentMonth@row)
This works to tell me the "Amount" of a specific month and year.
The problem is I get an #INVALID DATA TYPE message if the cell in the Date column is not populated but the cell in the Amount column is.
If I were the only one using this grid it would be okay but I am not and I don't want to hunt for errors every time someone inputs data like this.
Thanks in advance!