To use Google Sheets' SUM function to calculate totals, follow these steps:
Open Google Sheets and create a new or open an existing spreadsheet.
Select an empty cell where you want the total to appear.
Type an equal sign (=) to start the formula.
Type "SUM(" to begin the SUM function.
Select the range of cells you want to sum. You can either enter the cell range manually (e.g., A1:A5) or click on the first cell of the range and drag to the last cell.
Close the parentheses (")") to finish the SUM function.
Press Enter to calculate the total. The sum of the selected cells will be displayed in the cell where you entered the formula.
Note: You can also use the SUM function to sum multiple ranges by separating them with a comma (e.g., SUM(A1:A5, C1:C5)).
You can also modify the formula by adding or subtracting values or other formulas. For example, if you want to calculate the total amount with a discount, you can type "=SUM(A1:A5)-10" to subtract 10 from the sum.
By using the SUM function with different ranges, you can easily calculate the totals of different groups, rows, or columns within your Google Sheets.