Compilation fails at line 8. It says the “s” in “super” is wrong.
public class BasePlusCommissionEmployee extends CommissionEmployee {
private double baseSalary;
//constructor
public BasePlusCommissionEmployee( String first, String last, String ssn, int mth,
int day, int yr, double sales, double rate, double salary )
{
super( first, last, ssn, mth, day, yr, sales, rate );
setBaseSalary( salary );
}
Error message:

In all likelihood, you’re not calling the super constructor, the constructor for the CommissionEmployee class, correctly, and are probably passing in the wrong parameters. Fix that and your error will likely go away.