Question

The carpet Erin has chosen costs 2.50per square foot. how much will it cost her to carpet the floor?

Answer 1

I think it depends on the area of the floor.  You can figure that out if you
know the dimensions of the floor, like length and width and like that.

Answer 2

To find the total cost of carpeting the floor, you will first need to calculate the area of the floor.

And then your answer will be:

2.5 x Area of the floor in square feet