Payroll: calculation for ordinary weekly hours and average weekly hours

As per NZ employment rules, we have to pay our employees 8% AL entitlement as per the average hours worked or ordinary hours. As of now - we have to make those calculations manually outside the reckon payroll module. However, those calculations should be available automatically while processing payrun and we should simply choose the greater hours each time. It could be done in way of report or additional window (similar to AWE/OWP calculation screen when calculating Annual Leave).