International Box shipping to Brazil

Hello my friends. I suddenly have the need to post here to request information about international box shipping to Brazil. This should also include how is the best method to ship a box to Brazil from Miami, Florida, in the United States as that is where I will ship this box. I have already prepared the box for shipping so if your company has a drop off location near to Miami, please inform me of its address and hours of operation. My box is 1.5 ft by 1 ft by 10 inches and weighs 7 pounds including the box and other packing materials. This box does not contain anything that is breakable of or great value. It simply contains some magazines that I am sending to my uncle. No, they are not those kinds of magazines. They are clean. He simply is unable to purchase these magazine titles locally. Would you mind letting me know about how much you will charge me to ship this box to Brazil? How soon can you deliver it? Can you also require a signature of who the box is delivered? Thanks for emailing me this information.