Deleting Empty Lines Using A Macro

I have another report which needs to be sorted using a macro. However, before I can sort the data, I need to delete rows at the bottom of each report that have "0" values in column A and B. Again, each report I run is of different length so I need to write a code that will take that into consideration. Here is an example of what I need to do:

Sub second_step()
'
' second_step Macro
'

'
Range("C1").Select
Range(Selection, Selection.End(xlDown)).Select
Rows("7876:7876").Select
Range(Selection, Selection.End(xlDown)).Select
Selection.ClearContents
Range("A1").Select
End Sub

Now, the thing is, not every report will start having "0" values in row 7876. How do I write a code to reflect this?