I just wanted to warn you that Paypal invoicing doesn't always work. I sent an invoice to a customer. I was selling some items not related to my store and sold through a facebook group. The customer said the invoice had the correct amount but when she hit pay now it charged her less basically leaving off the shipping charges. When I called Paypal about this they had to take my info and said they would get back with me. The response I got was that the invoice sent to the customer was correct. When I tried to reply to the e-mail I got an auto response so I'll have to call yet again, sit on hold once again trying to get it straightened out. If you send invoices double check to see if the correct amount was paid. I know I will from now on. Luckily I think my customer will pay the shipping charges separately.