Client billing also availeble in % in case of fixed dollars

It would be nice to have a feature with client billing in procentages in case of an exact ammount of dollars.

Like this:

What i also can imagen… clients will look online… they see 15,- dollar.
that means we can’t charges more, thas ok, but than have an extra option webflow prices with a 20% bonus fee in return.

thats it!

regards,
Koen