Question on PPM (Parts Per Million)

At our recent South Eastern Growers meeting I was told that  an acre is
considered to be 2 million pounds of soil.

I am working on determining PPM, but the Soil test by my local
University states everything in pounds of amendment per acre.
If what I understand is true, I would just divide pounds of amendment per acre
by 2 to obtain PPM.

Is this true?

I am  terrible at math.

Thanks in advance:
Bob Attaway

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