Calculating Hours for Salaried Employees

Summary

Requirement to calculate hours for salaried employees

Content

We have a report requirement that fetches Earnings and Hours for all employees for each pay period. We have tried using Balance Groups and Run Results to fetch Hours but it did not fetch Regular hours for Salaried Employees. This issue does not occur with Hourly Employees.   
   
But we need to fetch all hours and the report should display the hours for all individuals who are salaried instead of hourly.   
  
Is there any formula for capturing salaried employee hours?    
   
Clarifications:   
The  ‘NORMAL_HOURS’ on the ‘PER_ALL_ASSIGNMENTS_M’ would fetch 40 hours for a salaried employee for a week, so we would get 80 hours for a biweekly pay period. In cases where there are no other elements tied to this employee, will displaying this 80 be logically correct?