字数太多写在下面了 求

题目

字数太多写在下面了 求
A livestock pen is built in the shape of a rectangle that is 2
times as long as it is wide.The perimeter is 54
feet.If the material used to build the pen is $1.75
per foot for the longer sides and $2.75
per foot for the shorter sides (the shorter sides have gates,which increase the cost per foot),find the cost to build the pen.
It costs $ ______to build the fence.

答案

怎么是英语的?