What are your thoughts about doing analysis for a company during the interview process?

Like the title says, I am in the interview process with a new-ish company based in Indiana. They are having me do major analysis on their database, along with analyzing their major selling platforms. I have easily spent over 40 hours so far, and if I make it to the next step, I will have to continue this process and continue to create presentations demonstrating my results.

My question is, should I continue working for free for a company, providing the analysis, without any sort of compensation or guarantee of the position?

***The position is an analyst position.

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