I'm trying to buy this style fence. I have 480 feet to cover and each rail is 16 feet long. how many do I Need? once they arrive i will cut them into 8 feet rails, how many posts would I need?

Im trying to buy this style fence I have 480 feet to cover and each rail is 16 feet long how many do I Need once they arrive i will cut them into 8 feet rails h class=