Thanks for all the answers.  I think this is starting to make sense.  Still a little complicated.  However,

I did a quick test (again) to estimate a $10 cashout to my bank.

Estimated 0.99 to convert from BTC to USD
Estimated 0.55 to transfer to my bank.

Did the conversion and indeed it was exact.
$9.01 USD after conversion and $8.46 deposited into account.

$1.54 for the test. 😉

Thanks