Final answer:
To add a total row in an Excel table, use the SUM function directly in the cells where you want the totals for columns B and C, or employ the AutoSum feature that does it automatically.
Step-by-step explanation:
To add a total row to the Expenses table and display totals for columns B and C using the Sum function, the correct step is: C) Apply the SUM function to cells in the Total row for columns B and C.
This can be done by positioning the cursor in the cell where you want the total to appear, typically below the last number in the column, and then typing =SUM(B1:B5) if you're totaling column B, for example, where B1 is the first number and B5 is the last number in the column.
When you press Enter, the sums of the respective columns will be calculated and displayed in the cells where you entered the formula. Remember, if you're using Excel's AutoSum function, it essentially does the same thing but can automatically detect the range of cells to calculate.
To add a total row to the Expenses table and display totals for columns B and C using the Sum function, you can apply the SUM function to cells in the Total row for columns B and C. This will automatically calculate the sum of the values in those columns. Option C is the correct answer.