It is wintertime, and you are a fruit and vegetable importer located in Miami, Florida. You want to place an order for 500 pounds of seedless grapes from a new and unknown supplier in Valparaiso, Chile. However, you don't want to pay for the grapes until they are received and inspected by you in Florida. How would you set up this deal in such a way that you get the grapes you want and the supplier in Chile is assured of a payment?