Copper as wire with casing or stripped getting paid

I finally I did a hands on visual , scrap yard scale pay out - No guessing - No hypothetical math - The real pay out deal .
I carefully took same wire Measured length to length First batch was a 55% type - Second batch was a 30% type
55% was 2 pounds & had a pay out of $ 1.78 - - 30% was 2 pounds & had a pay out of .86 cents
Naturally the stripped wire started out same weight and Oddly each one ended up being one pound each cleaned earning $2.25 each
I did not weigh at home as I figured the scrap scale is the reality no matter what
There could be a discrepancy that such low weight at a Scrap yard scale could average out to closest dominator that once you get to some
heavy weight it matters not . Regardless it's clear to me based on the scale at Weissman's stripped wire pays out better
I had a PM with a member who felt that it was equal based on getting paid for the non copper weight of wire

I am pretty sure the scrap yard scale is not best for low - low weight , but the pay out percentage gain for clean seems high enough to cover discrepancy
Since I did not do an 80% yet that might be the type worth leaving as is That will be my next test