I have a spreadsheet where I am entering Groceries on each row every time I visit a store. I have calculated the overall sum, but now I would like to calculate the average cost per month for the groceries.
I don't even know where to begin on this. I have posted my spreadsheet (https://docs.google.com/spreadsheets/d/1R0zYMAigDULzm8oM2icsPK55BP162kVvctpx2cOSOIE/edit?usp=sharing) and gave editing priveleges to anyone who can attempt it. If someone already posted a solution and you think yours is better, please create a new row in the Summary section so I can compare them.