How to extract the fundamental component from a discrete data

Hi, everyone

Sorry if it seems to be a beginner's question, but I am trying to extract the fundamental component from a discrete data with mathcad.

These data comes from my simulation results in Simlink. First, I want to get its fundamental magnitude and phase information, and then subtract the fumdamental component from original data to get the remaining harmonic components. But I don't know how to do with that in mathcad.

I would appreciate much if someone could give me a bit of good advice.