Sarah is repairing her fence. She has purchased pieces of wood for the new fence posts, which are pieces of lumber with dimensions 4by4 inches and 6 feet long. She cuts off 4 slanted portions of the top of each fence post, creating a square based pyramid at the top of each post that is 3 in. tall (with base edges of 4 in.). She is now planning on painting the posts. What is the total surface area she will need to paint, if she has 10 posts and will paint the entire surface area of each post? Round the answer to the nearest tenth of a square foot.

[math]79.8 \ "ft"^2[/math]

[math]80.9 \ "ft"^2[/math]

[math]82.0 \ "ft"^2[/math]

[math]83.1 \ "ft"^2[/math]