I am using AutoCAD MEP andRivit with navisworks. I am new with using these ACAD add-ons.

I am adding conduit for a large building drawing and my project manager wants to know how many lineal feet of each type of conduit I have and how many other parts I have like 90's and other fittings.

What is the easiest way to extract this data from the drawing: Dataextraction, schedule, list...? And how do I do it?

I was looking at some youtube tutorial on schedules and tried this, but it gave me an empty schedule with a bunch of question marks.