Hi,

You may check this link to have an understanding creating reports in v8:

http://www.odoo.yenthevg.com/creating-custom-reports-odoo-8/ 

After understanding the qweb report, you should create a new report with the xml template file and a report parser python file. In the report you want to have invoice entries for filtered customers and only show those respective fields for each entries right? For that you need to write a function in the parser file, that returns a list of dictionaries containing the invoice data of selected invoice records in current list view.

You can then iterate in that list to print the fields data you mentioned. I can help you with the report creation.