We can find the **sum of a range** with the **INDEX** function. The steps below will walk through the process.

*Figure 1: Result of the SUM of a Range (THE ROWS) with the INDEX Function*

**Setting up the Data**

We will set up the data following the scheme in figure 2.

- Cell A4 to Cell A7 will contain the different
**Branches** - Cell B3, Cell C3, and Cell D3 will contain the
**profits**from 2018 to 2016 - Cell E3 will be titled as
**TOTAL** - Cell B4 to Cell D7 will contain the profits for each year for the branches

* Figure 2: How to Find the SUM of a Range with the INDEX Function*

**General Formula**

**=SUM(INDEX(array,column_number,row_number,))**

Array refers to the **range** in the spreadsheet that we intend to sum.

**SUM of a Range (ROW) with the INDEX Function**

Let us sum the profit for the three years of **Texas branch**

- We will click on
**Cell E4**and input the formula below

**=SUM(INDEX(B4:D7,1,0))**

* Figure 3: SUM of a Range with the INDEX Function*

- We will press
**Enter**

* Figure 4: SUM of a Range with the INDEX Function*

- We will use the drop-down feature to get the sum of the other branches

* Figure 5: Result of the SUM of a Range (THE ROWS) with the INDEX Function*

**Explanation**

Formula: **=SUM(INDEX(B4:D7,1,0))**

In this formula, the **INDEX** function returns the row number contained in the range. This happens such that the formula changes in this pattern when the drop-down is used:

`=SUM(INDEX(B4:D7,1,0))`

`=SUM(INDEX(B5:D8,1,0))`

`=SUM(INDEX(B6:D9,1,0))`

`=SUM(INDEX(B7:D10,1,0))`

After the INDEX function returns the values in the row of the range, the **SUM** function adds the values and the result is displayed.

**Note**

If we want to sum columns rather than rows, we will alter the position of the zero and one in the formula.

The formula becomes:

**=SUM(INDEX(B4:D7,0,1))**

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