Excel SumIf or SumProduct Help

I have a column off to the right of a long spread sheet that totals up the amount we spend at particular companies.

=SUMIF(C:C, "TigerDirect",L:L)

What I would like to do is instead of having to Type Each company in the Formula I would like it to pull the company name from the column to the right.

Something like

 =SUMIF(C:C, "=O15",L:L)

However that does not work.
Jeremy PierceAGMAsked:
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Naresh PatelFinancial AdviserCommented:
Just change to this

Naresh PatelFinancial AdviserCommented:

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Jeremy PierceAGMAuthor Commented:
I feel stupid now...that was easy.

Thanks! Many more to come. Cause they want to change all the workbooks for next year.
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