It is very difficult to tell you how to test EasyIn class without knowing what it contains.
Kindly tell us in details what all...
Just copy this code below in a java file and name it "SalesStaff.java" and try to compile it.
It will compile successfully as it did for...
I guess you forgot a . (dot) after super keyword in this line :
return super inputSalary / 52.0 + bonusPoints * 20;
Separate names with a comma.