CUBEMEMBER() syntax issue.

Hello!

I'm experiencing some issues while trying to modify the following expression. I hope guys you can help me

Formula:

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What I need to do is change the very last argument, "[COMISIONES TARJETAS DE CRÉDITO]", for a cell reference like "A1". In order to do that I've typed this:

Formula:

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... and got a syntax error. Can you please tell me how to write the formula correctly?

Thank you very much!