For orders of two or more:  Click on your cart.  Click on the cards you want to buy from me.  Click on the "Request Total From Seller", Button.  It takes you no time at all to request an invoice.  
Please see my store description for additonal information.  
A one time, .65 cent handling fee is added to all orders.  If you overpay on the shipping, I refund you the difference upon label printing.