If you decide to spill the results, you can then use the spilled range operator (#) to perform a calculation on the spilled range. Simply reference the first cell of the spilled range with a # ...

We have created sample data containing sales of 6 different companies in four consecutive months (from January to April). The Total Sales sheet represents the total number of sales in all four months ...

Excel has over 475 formulas in its Functions Library, from simple mathematics to very complex statistical, logical, and engineering tasks such as IF statements (one of our perennial favorite stories); ...