Comparing two months

[randy]

This is one option.

Docs: Comparisons report

What is the Comparison Report? An easy way to better understand your spending is by comparing it across two time periods. The time periods could be a week, month, quarter, or year. When your income or spending changes from one period to the next, you can gain a better understanding of what happened by looking at which categories or groups changed the most and least. Our financial comparison report is designed to help you gain those insights. The sheet compares your spending or earnings acros…

If you want to create more unusual periods you can probably use the bulk of the formulas but may need to identify the periods differently.