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An open box is constructed as shown at right. The sides of the box are made out of sheet metal costing per square foot while the bottom is made of a more expensive metal costing per square foot. How much, in terms of x and h, will it cost to construct the box?

1. Find the surface area.
2. Sum up the cost of each part.

Surface Area 

Cost of Construction 

3 dimensional rectangular prism, front face, left side labeled h, bottom side labeled x, left face, bottom side labeled x.