Macro confusion with document name

Hi, I am a baby VBAer and could really use some help! Everything in this macro works as it should with one exception. The goal of the macro is to copy certain info from a doc called Sales Copy & paste it into another doc called PAA. In the code below it often refers to "Sales Copy1". In reality, this will often be titled something else like "Sales Copy 4" or "Sales Copy 12". How can I change this code to understand the doc is not always named Sales Copy1? I believe I should be using "dim nam as variant", but I'm not sure how or where. This is a fantastic forum & everyone is wonderful! I appreciate any help that can be offered! Thank you in advance.