OK here is the issue. I want to carryover a balance from previous months each month and display it in a cell. So is there a better way to do this than my simple formula?

Here are the column headings:

A B C D
Budget - Actual - Balance - Carryover


These will be on each month. In the first month I just have Carryover (D)= Balance (C). The second month it would be Balance (C) + prior month Carryover. And so on. So is there a better way at doing this?

Thanks in advance