Hi, Mediacreed!
I want to help you with regards into this matter. You’ll see $13.3 when you subtract $1.90 from your item price which is $15.20 ( $15.20 - $1.90), you’ll get $13.3.
The price of your item is $15.20 and not $19.00. $19.00 is the listing price which includes the buyer free and author free.
Correct me if I’m wrong.
Thanks