SUMPRODUCT Problem Using Indirect Addressing

Hoping someone can help me with this one as banging my head against a brick wall !!

I have this formula working correctly

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I need to make this Dynamic for the last row. I have a named Cell at the end of the area and

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I then try to use this in the SUMPRODUCT as

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Hoever this equates to Zero rather than the correct answer. If I remove the ROW from the above and enter 14 in the INDIRECT statement below it works fine.

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Any ideas why using ROW(LastRow) doesn't seem to work ?

Thanks

Administrative Note:

We would very much like to help you with your query, however the thread title does not really convey what your request is about. Tell us what you are trying to do, not how you think it should be done.

Please take a moment to amend your thread title. Make sure that the title properly explains your request. Your title should be explicit and not be generic (this includes function names used without an indication of what you are trying to achieve).

Please see Forum Rule #1 about proper thread titles and adjust accordingly. To edit the thread title, open the original post to edit and then click on Go Advanced (bottom right) to access the area where you can edit your title.

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A good sample workbook has just 10-20 rows of representative data that has been desensitised. It also has expected results mocked up, relevant cells highlighted and a few explanatory notes.