Copy Data From One Workbook To Another Workbook

I have two separate workbooks, one is used to create job estimates, and the other is like a running list of the estimates ( Tracking Sheet) that have been entered and completed. What I need to do is send select data from the estimates workbook and enter it on the last line of the Tracking Sheet workbook in a certain order.

Sub copy_to_another_workbook()
Dim smallrng As Range
Dim destrange As Range
Dim destWB As Workbook
Dim Lr As Long
Application. ScreenUpdating = False
If bIsBookOpen("P&WM Estimate Tracking Sheet.xls") Then
Set destWB = Workbooks("P&WM Estimate Tracking Sheet.xls")
Else.............