The answer is SUM functionWhat is the SUM function?The SUM function is a built-in tool in spreadsheet software like Microsoft Excel or Google Sheets. It is used to quickly add numbers from one or more cells.How it works ?You tell the spreadsheet which cells to add by typing them inside the parentheses. Example:[tex]=SUM(A1:A5)[/tex]This means:Add all the values from cell A1 down to A5.If the cells look like this:A1 = 10A2 = 20A3 = 15A4 = 5A5 = 30Then =SUM(A1:A5) will give you:10 + 20 + 15 + 5 + 30 = 80