Does fiverr deduct an amount on our gigs extras?

[incomesurfer]

Hello I am incomesurfer, recently I became a level 1 seller here in fiverr and I want to manage my extras well. I know that fiverr deducts 1$ for every gig that had been ordered but I want to know if fiverr deducts a certain amount or portion if someone bought my gig and add an extras on their order. Thanks for your help guys

[smokey1871]

They deduct 20% of everything that you sell. Not just $1.