Sheets("Timetable").Select 'Select the right sheet to copy range
Range("E4").Select 'Select the right cell to copy range
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
    :=False, Transpose:=True 'Paste Special to the cell

'To clear previous data
Range("H4:L34").ClearContents

'To key in OT data
Dim Day 'Stores the day of the week
Dim PH 'Stores whether a particular day is a public holiday
Dim OT_Hours As Double 'Stores the OT Hours on a weekday
Dim Total_Hrs As Double 'Stores the total number of hours worked in a particular day
Dim day_count As Integer 'Sets the loop from the row of day 1 to row of day 31
Dim Rmk 'Stores if LL/OL/CSE/etc

Range("E4").Select 'Select the right cell to start for keying and calculation of OT hours, note its in "Template" sheet

For day_count = 1 To 31 'Loop for one month, maximum is 31 days

    Day = ActiveCell.Value 'Current cell gives the value of the day of the week, to be stored as day
    ActiveCell.Offset(0, 1).Select 'Move 1 cell to the right
    PH = ActiveCell.Value 'Current cell states whether its a public holiday, to be stored as PH
    ActiveCell.Offset(0, 1).Select 'Move 1 cell to the right
    Total_Hrs = CDec(ActiveCell.Value) 'Current cell gives the total number of hours worked that day, to be stored as Total
    'All cases that results in the different OT hours
    
    If Total_Hrs = 0 Then
    ElseIf Day = "SA" And PH = "Y" Then 'If Saturday and Public Holiday
        ActiveCell.Offset(0, 4).Select 'Move 4 cells to the right
        ActiveCell.Value = Total_Hrs 'Assign the active cell OT hours (X3)
    ElseIf Day = "SA" Then 'If Saturday and not Public Holiday
        ActiveCell.Offset(0, 2).Select 'Move 2 cells to the right
        ActiveCell.Value = Total_Hrs 'Assign the active cell OT hours (X1.5)
    ElseIf Day = "SU" And PH = "Y" Then 'If Sunday and Public Holiday
        ActiveCell.Offset(0, 5).Select 'Move 5 cells to the right
        ActiveCell.Value = Total_Hrs 'Assign the active cell OT hours (X4)
    ElseIf Day = "SU" Then 'If Sunday and not Public Holiday
        ActiveCell.Offset(0, 3).Select 'Move 3 cells to the right
        ActiveCell.Value = Total_Hrs 'Assign the active cell OT hours (X2)
    ElseIf PH = "Y" Then 'If Public Holiday on weekday
        If Total_Hrs > 8 Then 'If there is OT on Public Holiday
            OT_Hours = Total_Hrs - 8 'Calculate the effective OT hours
            ActiveCell.Offset(0, 1).Select 'Move 1 cell to the right
            ActiveCell.Value = 8  'Assign the active cell OT hours (X1)
            ActiveCell.Offset(0, 1).Select 'Move 1 cell to the right
            ActiveCell.Value = OT_Hours 'Assign the active cell OT hours (X1.5)
        Else
            ActiveCell.Offset(0, 1).Select 'If no OT on Public holiday, just move one cell right and key in
            ActiveCell.Value = Total_Hrs 'Assign active cell OT hours (X1)
        End If
    ElseIf PH = "HD" Then
        If Total_Hrs > 4 Then 'If there is OT on a half-day working day
            OT_Hours = Total_Hrs - 4 'Calculate the effective OT hours
            ActiveCell.Offset(0, 2).Select 'Move 1 cell to the right
            ActiveCell.Value = OT_Hours 'Assign the active cell OT hours (X1.5)
        Else
        End If
    ElseIf Total_Hrs > 8 Then 'If Weekday and OT
        OT_Hours = Total_Hrs - 8 'Calculate the effective OT hours
        ActiveCell.Offset(0, 2).Select 'Move 2 cells to the right
        ActiveCell.Value = OT_Hours 'Assign the active cell OT hours (X1.5)
    End If
    OT_Hours = 0 'Restart OT Hours
    Selection.End(xlToRight).Select 'Move selected cell all the way to the right
    ActiveCell.Offset(1, -8).Select 'Move selected cell to next row and column to start
Next day_count

'Append the monthly data from each staff to the Raw Data Sheet
'Declare all required variables to store data
Dim Name 'Name of personnel
Dim Month 'Month of work
Dim SCode 'Staff Code
Dim NormHr As Double 'Normal Hours, applicable for part-time
Dim OTHr As Double 'OT Hours, applicable for full-time
Dim Other As Double
Dim DOR As Date 'Date of report
Dim DoneBy 'HR Personnel that prepared the spreadsheet
Dim Leave As Double 'Days of leave
Dim MC As Integer 'Days of MC
Dim TrainingHr As Double 'TrainingHrs in that month
Dim Days As Integer 'Days in that month

'Store all data as variables
Month = Range("C2").Value 'Store month
SCode = Range("G2") 'Store staff code
NormHr = CDec(Range("G36").Value) 'Store normal hours of work, for part-timers
OTHr = CDec(Range("G37").Value) 'Store OT hours (effective, e.g. if X1.5, OTHr = 1.5 and not 1)
Other = CDec(Range("G38").Value) 'Store other reburisements/deductions
DOR = Range("G41").Value 'Store date of report
DoneBy = Range("G42").Value 'Store personnel who key in data
Leave = CDec(Application.WorksheetFunction.CountIf(Range("C4:C34"), "LL")) 'Store total local leave
Leave = Leave + Application.WorksheetFunction.CountIf(Range("C4:C34"), "OL") 'Store total local leave + overseas value
Leave = Leave - 0.5 * Range("G39").Value 'Account for half-day leave
MC = Application.WorksheetFunction.CountIf(Range("C4:C34"), "MC") 'Store total MC days for that month
TrainingHr = CDec(Range("G40").Value) 'Store total training hours for that month
Days = 31 - WorksheetFunction.CountA("F4:F34") 'Store total no. of days in that month

Sheets("StaffData").Select 'Move to sheet "StaffData"
'Select Cell B2 to start

'Declare all required variables to store data
'Start with variables from spreadsheet
Dim SCodeSD 'Staff Code from the StaffData Sheet
Dim Nat 'Nationality
Dim Status 'Whether personnel is full/part-time
Dim Basic As Double 'Basic Pay (For full-time)
Dim DayRate As Double 'Day Rate (For part-time)
Dim HrRate As Double 'Hourly Rate (For both full and part-time)
Dim Age As Double 'Age, will affect CPF rate
Dim PRYears As Double 'No. of years of PR, will affect CPF rate
Dim LeaveE As Double 'Leave Entitled

'Other intermediate variables required
Dim Total As Double 'Total amount from basic and over-time
Dim LeaveL As Double 'Leave Left
Dim MCT As Integer 'MC Total
Dim TrainingT As Double 'Training Total
Dim CPF_ee As Double 'CPF Employee
Dim CPF_er As Double 'CPF Employer
Dim CDAC As Double 'CDAC Contributions

ActiveSheet.ListObjects("StaffInfo").Range.AutoFilter Field:=2, _
    Criteria1:=SCode 'Filter by staff code
'Creating dictionary, looping through and store data is not a good solution because it takes up process time
'expotentially as data increases and increases interim memory space
'Better method is to do filter as above
Range("StaffInfo[[#Headers],[Staff Code]]").Select  'Select Cell B2 (column of staff code to start)
Selection.End(xlDown).Select 'Select the last row (actually there is only one row of available name after filter)
Name = ActiveCell.Offset(0, -1).Value 'Store name
ActiveCell.Offset(0, 2).Select 'Move three columns right
Nat = ActiveCell.Value 'Stores whether or not he/she is Singaporean
ActiveCell.Offset(0, 5).Select 'Move five columns right
Status = ActiveCell.Value 'Stores whether he/she is full/part-time
ActiveCell.Offset(0, 1).Select 'Move one column right
Basic = CDec(ActiveCell.Value) 'Stores monthly pay of employee
ActiveCell.Offset(0, 1).Select 'Move one column right
DayRate = CDec(ActiveCell.Value) 'Stores day rate of employee
ActiveCell.Offset(0, 1).Select 'Move one column right
HrRate = CDec(ActiveCell.Value) 'Stores hour rate of employee
ActiveCell.Offset(0, 1).Select 'Move one column right
Age = CDec(ActiveCell.Value) 'Stores age of employee
ActiveCell.Offset(0, 1).Select 'Move one column right

If ActiveCell.Value = "NA" Then
    PRYears = NA
Else
    PRYears = CDec(ActiveCell.Value) 'Stores no. of years of PR
End If
ActiveCell.Offset(0, 2).Select 'Move two colums right
LeaveE = ActiveCell.Value 'Stores no. of days of leave entitled

If Status = "F" Then
    Total = CDec(Basic + OTHr * HrRate)
ElseIf Status = "P" Then
    Total = CDec(NormHr * HrRate + OTHr * HrRate)
End If

'Don't use nested If. Use dictionary keypad values for CPF or create another sheet
'(like what I have done)
'Consider customising cases if possible

'Nationality keypad values
If Nat = "PR" And PRYears > 3 Then
    Nat = "S"
ElseIf Nat = "PR" And PRYears > 2 Then
    Nat = "PR2"
ElseIf Nat = "PR" And PRYears > 1 Then
    Nat = "PR1"
ElseIf Nat = "S" Then
    Nat = "S"
Else
    Nat = "N"
End If

Sheets("CPF").Select 'Move sheet to CPF to key in data to calculate CPF

CDAC = CDec(Range("L1").Value) 'Assign CDAC ammount from cell
Range("C1") = Total 'Assign cell with total salary
Range("F1") = Nat 'Assign cell with Nationality
Range("I1") = Age 'Assign cell with age
Range("H3").Select 'Select the start row of CPF employee
Selection.End(xlDown).Select 'Shift cell all the way down
CPF_ee = CDec(ActiveCell.Value) 'Assign CPF of employee from cell value
ActiveCell.Offset(0, 1).Select 'Shift cell one column to right
CPF_er = CDec(ActiveCell.Value) 'Assign CPF of employer from cell value

Sheets("PaymentData").Select 'Move sheet to RawData to key in stuff
Range("B2").Select 'Select the right cell to start

Selection.End(xlDown).Select 'Move cursor to end row that is filled
ActiveCell.Offset(1, 0).Select 'Move one row down
ActiveCell.Value = Name 'Assign name to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = SCode 'Assign staff code to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = Month 'Assign month to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
If Basic = 0 Then
    Basic = Total - OTHr * HrRate
Else
End If
ActiveCell.Value = Basic 'Assign Basic Pay amount to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = OTHr * HrRate 'Assign OT Pay amount to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = CPF_ee 'Assign CPF Employee amount to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = CPF_er 'Assign CPF Employer amount to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = Other
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = Leave 'Assign no. of days of leave on that month to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = MC 'Assign total no. of MC days
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = TrainingHr 'Assign total no. of training hours on that month to cell

'Creating dictionary, looping through and store data is not a good solution because it takes up process time
'expotentially as data increases and increases interim memory space
'Copy data from Template and StaffData, verify and count if required
ActiveSheet.ListObjects("MonthlyData").Range.AutoFilter Field:=2, Criteria1 _
    :=SCode 'Filter by Staff Code
Range("J2").Select 'Column that stores leave that month
LeaveL = CDec(LeaveE - WorksheetFunction.SumIf(Range("C:C"), SCode, Range("J:J")))
'Assign leave left by deducting entitled - sums up all cells in that column
Range("K2").Select 'Column that stores MC that month
MCT = CDec(WorksheetFunction.SumIf(Range("C:C"), SCode, Range("K:K"))) 'Total no. of MCs
Range("L2").Select 'Column that stores training hours that month
TrainingT = CDec(WorksheetFunction.SumIf(Range("C:C"), SCode, Range("L:L"))) 'Total no. of training hours

Selection.End(xlDown).Select 'Move cursor to end row that is filled
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = LeaveL 'Assign no. of days of leave left to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = MCT 'Assign cumulative no. of MC to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = TrainingT 'Assign total training hours to cell
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = DoneBy 'Assign HR Personnel that prepared the spreadsheet
ActiveCell.Offset(0, 1).Select 'Move one column right
ActiveCell.Value = CDec(Total - CPF_ee - CDAC + Other) 'Assign Nett Pay
ActiveCell.Offset(0, -14).Select 'Move 14 columns to left and end