I have 2 sets of data A & B with INDEX_MATCH formula to return B. In my attached example, I have two options 1&2. My preferred one is Option 1. In option1, cell C15 is sum of C10& C11. However, the formula returns #NA. If I use drop down list as in option 2, the formula works perfectly though not preferred option. To shorten the story, I have attached example file which can explain much better on what I want.
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