I'm  trying to set the computation of lates in Payroll.
Modules installed are Payroll, Attendance, Time Off, Planning

I want to compute the lates or absences without time off entry because our computation for payroll and must show in pay slip is:

Work Days = 5 days x 100.00 = 500.00

less Lates  =  1 hour x (100.00 / 8) = -12.50

less Absence = 2 days x 100.00 = -200.00

Net Salary = 287.50

I understand that in Contract Work Entry source can be:

• Work Schedule - based on work schedules, if work is Mon to Fri, 8 am to 12 pm and 1 pm to 5 pm then work entries 5 days and have to enter time off for lates or absences, but if we enter time off then the work entries are reduced by the time off. time off has to be entered manually 
• Attendance - work entries are purely based on the attendance entries in which case time in / out can be earlier or later.
• Planning - almost same effect as work schedule but work entries are taken from planning schedule, time off has to be entered manually

None of these auto computes the lates and absences.  Is there a way or do I need to customize comparing attendance and work schedule or planning?