Can I ask a silly question.

If you sell products on Ebay with postage included, 

ie free postage for buyers,

And If I choose to use Ebay Postage Labels,

The final value fee for the postage, is included in the total paid

price?

Eg. 

I sell a product for $20.00 all in, free postage. its < 500g.

When sold, the 

FVF

Anchor Store 6.5% of $20.00

Then pay $7.40 for postage, assuming you have satchels.

Does ebay charge 6.5% on $7.40 aswell?

I don't think so, But if someone could confirm.