I am trying to make a summary table that can reference a bunch of different sheets that each contain the budgeting for a given month. When I enter the sheet references in my summary sheet, I've been using formulas such as =SUM('2020-06'!M$51:M$52) to specific which cells I'd like to add up from which monthly sheet. That example is from June, 2020. Is there a way to increment this automatically to make my summary table get the data from the same cells in each sheet? i.e by incrementing the sheet names to 2020-07, 2020-08, etc. (Or is there another way?)