Two tables
We'll be working with two tables. The first table below shows the store names, the month, and the monthly sales. It also has a column with quarterly results. I find that this monthly table makes calculations much easier than other methods that use the "remainder" function. This is our starting point. As promised, we need a second table to present the data in a usable way. This second table has columns for Q1, Q2, Q3, and Q4, as well as additional columns for the store and year. So we have a row with the store, year, and then Q1, Q2, Q3, and Q4. This reporting table will make it easier to see the results. See how it works, you'll be surprised, and I hope you can use it in your own system