Design an algorithm that will read a file of employees records and
produce a weekly report of gross earnings for those employees. Gross
earnings are earnings before tax and other deductions have been
deducted. Each input record contains the employee number, the hours
worked and the hourly rate of pay. Each employee's gross pay is
calculated as the product of the hours workedd and the rate of pay. At
the end of the report, print the total gross earnings for that week.