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# How to Find the SUM of a Range with the INDEX Function

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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