Total Hours to be shown on payslip

Summary:

We have a business requirement to show the total hours worked in a pay period on payslip. 
If an employee has multiple elements with input values are Hours and rates. Then hour processed with these elements are presented in the payslip. 
But we would like to show total of these hours processed in payroll as total hours.

Desc        Rate             Hours     Earnings
REG            15.00    20.00     300.00
HOL PAY        12.00    10.00    120.00
OVT            25.00    15.00    375.00 
Total                        795.00

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