Creating A Save Invoice Style Macro

I am still in the process of creating my Invoice, and now I want to add a proper save macro. I want to add a Macro button, which when clicked it copies that invoice sheet as it is and then places it at the end of the sheet tabs, so they're saved after the first 2 important parts of the invoice, and then saved in time order. If possible, i'd also like it to rename the invoice tab to the Customer's name/lastname IF Possible. I've attached the file so if someone fancys trying to do it for me, they can. I want these saved sheets to be seperate for each invoice/customer, and I want them to be in the same file as the invoice 'creator' it's self.