Can I find or calculate the weighted path distance for a NavMesh path?

I would like to use the NavMesh to help an agent decide which goal to go for next. In this case, I would like to ask the NavMesh what the weighted distance is along a path - taking into account the different travel costs associated with different areas. Then I want the AI to take the cheapest route to the cheapest goal. Is there a way to ask CalculatePath for the weighted length?

 

https://forum.unity.com/threads/cost-of-a-navmeshpath.437486/

I have also made a pastebin, but there might be a better solution in the forum thread I linked.
Let me know if this works for you!