How to pull data into other columns when row #'s change between reports

book1.JPG
book2.JPG

Kind of lost on writing this macro, as I just began a few weeks ago. book1 and book2 images attached, and also workbook also attached to explain the below:

Sheet1 has customer information, including customer name, #, and all the related documents (invoice/payment info). The Customer ID and Customer Name are only at the heading of the information, and I need it to be pulled into each row to be included with the documents (invoice/payment info). However, the number of documents can change on a weekly basis, therefore, changing what rows all the data is on.

Basically, I need Sheet1 to end up looking like Sheet1(2). As previously stated, the number of rows per customer can change weekly, etc.

Is this even possible?