Double Fouls

[rookieref2005]

Ok NFHS rules.

On a passing play there's a late hit on the QB and a late hit out of bounds. Are both penaltes enforced against B (total 30 yards)?

On a separate play, A is guilty of illegal motion, but B has a late hit on the QB. Do these still offset?

And last, A is guilty of illegal motion, but B hits the quarterback late and inferferes with the receiver. All of it offsets?

Thanks for your help.