Find duplicates in a column and add their corresponding values from another column

Question

I have column A with staff ids and hours worked in column K.

I would like if a staff id appears more than once to add hours worked and put the result in another colu

Answer 1

Sub SelectColoredCells()
    Dim rCell As Range
    Dim lColor As Long
    Dim rColored As Range

    'Select the color by name (8 possible)
    'vbBlack, vbBlue, vbGreen, vbCyan,
    'vbRed, vbMagenta, vbYellow, vbWhite
    lColor = RGB(156, 0, 6)

    'If you prefer, you can use the RGB function
    'to specify a color
    'Default was lColor = vbBlue
    'lColor = RGB(0, 0, 255)

    Set rColored = Nothing
    For Each rCell In Selection
        If rCell.Interior.Color = lColor Then
            If rColored Is Nothing Then
                Set rColored = rCell
            Else
                Set rColored = Union(rColored, rCell)
            End If
        End If
    Next
    If rColored Is Nothing Then
        MsgBox "No cells match the color"
    Else
        rColored.Select
        MsgBox "Selected cells match the color:" & _
            vbCrLf & rColored.Address
    End If
    Set rCell = Nothing
    Set rColored = Nothing
End Sub

this highlights the duplicates