How to obtain type parameter of furniture

How to get a type parameter (cost or manufacturer, for example) of all elements of each type present in the project?

I want to get the cost of each element present in my project, but I know that the “cost” is a type parameter. So, I can not get it with Element.GetParameterValueByName.

How do i do that?

PS: “custo” is cost and “fabricante” is manufacturer.

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just select “Type” parameter first and then ask for “Cost”:

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Thanks for your help, guys.