Excel: How to sum up cells that are next to cells of the same number

Question

I have two columns of data. The first column contains categories in the form of numbers, and the second column contains data that I want to sum up. So if you see the attached picture, I'd like to sum up all the red, green and blue into a single row, because each group shares the same numbered neighbor in the left column.

I tried using SUMIF but that doesn't seem to be designed for this.

Answer 1

You are definitely barking up the right tree with SUMIF.

Where: =SUMIF(VALUES for condition, Condition, NUMBERS to Sum)

Take a look at the attached example I put together which I believe is what you are after:

SUMIF Example

Remember to lock the appropriate cells, in my case the VALUES for condition and NUMBERS to sum so that I can drag the formula which updates the Condition cell.

Answer 2

You could use column C to calculate a cumulative sum, and reset whenever the value in column A changes. So, you would:

• set C1 to =B1
• set C2 to =IF(A1=A2, C1+B2, B2)
• copy C2 down to the end of the range

Now you can apply conditional formatting on column C to highlight the final sum when the next cell in column A is different, or you could make column D where:

• set D1 to =IF(A1=A2, "", C1)
• copy D1 down to end of the range

This gives just the final sums, and empty cells for everything else. You can hide column C, since it's an intermediate result.