Step 1 :First, we need to calculate the total surface area of the box. The box has six faces: two of length x width, two of length x height, and two of width x height. So, the total surface area of the box is \(2*(8*6) + 2*(8*4) + 2*(6*4) = 208\) square inches.
Step 2 :Next, we need to calculate the area of one sticker. The area of a sticker is its length times its width, so the area of one sticker is \(2*4 = 8\) square inches.
Step 3 :Finally, we divide the total surface area of the box by the area of one sticker to find out how many stickers Sarah needs. So, the number of stickers needed is \(\frac{208}{8} = 26\).
Step 4 :Final Answer: Sarah needs \(\boxed{26}\) stickers to cover the box.