Do we have a source for console makers getting $20/game? I find it hard to believe.
It's 30% for Digital Games ($18). 30% is the standard rate across most stores, Google Play, Apple, Steam etc.
The platform holder gets a lower cut from Physical games around $12, as retailers need to take a cut. Though not every source says the same thing, and certain games may cut deals with the platform holder. I.E Platform holder taking less of a cut for Exclusive content, or early dlc on that platform.
^ This image includes marketing, which is questionable as that's paid for beforehand, really that should probably just be added to the Publisher's cut.
So if the Platform Holder waived their cut and no other changes were made you'd get this price instead of $60:
Digital - $42
Physical - $48
Predictions (Made July 2019)
LTD: PS4 - 130m, Switch - 110m, XBO - 52m 2019 : PS4 - 15m, Switch - 18.8m, XBO - 4.8m 2020: Switch - 22m (Peak Year)