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# How to sum values in excel only if they match a category id in a lookup

Questions:

Say I have a product category lookup like so:

``````Sheet 1

Product Name    |    Product Category
--------------------------------------
product 1       |    A
product 2       |    A
product 3       |    B
product 4       |    A
product 5       |    B
product 6       |    C
``````

and I also have a list of purchases which only use Product Name like this:

``````Sheet 2

Product Name    |    Purchase Quantity
---------------------------------------
product 1       |    35
product 4       |    10
product 5       |    5
``````

I would like to produce a rollup like this:

``````Product Category   |    Purchase Quantity
------------------------------------------
A                  |    45
B                  |    5
C                  |    0
``````

I’ve tried a variety of ways to solve this like:

``````SUMIF(LOOKUP('Sheet 2'!A2:A6,'Sheet 1'!A:A,'Sheet 2'!B:B), "=A", 'Sheet 2'!B2:B6)
``````
``````SUMPRODUCT(LOOKUP('Sheet 2'!A2:A6, 'Sheet 1'!A:A, 'Sheet 2'!B:B)="A"*'Sheet 2'!B2:B6)
``````

Excel doesn’t like the first one. It says the formula is incorrect, but I’m not seeing why. The second one yields #VALUE. Any help on this would be much appreciated. Thanks in advance!

With A in D2, use this as an array formula.

``````=SUM(SUMIFS(Sheet2!B\$2:B\$4, Sheet2!A\$2:A\$4, IF(Sheet1!B\$2:B\$7=D2, Sheet1!A\$2:A\$7)))
``````

Array formulas need to be finished with Ctrl+Shift+Enter, not just Enter.

In my opinion there is no need to use complex formulas for such an easy question. Just add another column next to Purchase Quantity sheet 2 to get the Product Category and simply use =SUMIF. I have prepare a solution to illustrate my thoughts:

Formula for VLOOKUP:

``````=VLOOKUP(D2,\$A\$2:\$B\$7,2,FALSE)
``````

Formula for SUMIF:

``````=SUMIF(\$F\$2:\$F\$4,"=" & A10,\$E\$2:\$E\$4)
``````

Results: 