You have this side over here and this side over here, which have the same dimension. They both have an area of x times h. You have x times h. And then our material is $6 per square meter. So 6 times x times h would be the cost of one of these side panels. But so for two of them, we have to multiply by 2. So plus 2 times 6 times h. And then we have these two side panels. We have this side panel right over here. And we have this side panel right over here.