John's shirt cost 60% more than his pants.  His pants cost $50.  How much was John's outfit?
John's pants cost 50*.6=$<T>multiply(50, 0.6)=30.0 more than his pants
So his shirt cost 50+30=$<T>add(50, 30)=80
So in total he spent 80+50=$<T>add(80, 50)=130
