If I need to 201 ft. of carpeting for a room, and the carpet?
You will need more information that that. The padding is sold by linear foot, but you dont say how wide the roll is. If its a 12 wide roll, the answer will be much different than a 6 wide roll. In addition you will need to know the size of the room. Unless the room width is an exact multiple of the roll width, you will have waste which will affect your cost.