A cuboid is a box-shaped object. It has six flat faces, and all angles are right angles. And all its faces are rectangles. Assume that the cuboid is open at the top (i.e., the green area) and that it has a volume of 1000ft3. The side materials cost C dollars per square foot, whereas the material for the bottom needs to be thicker and costs 3C dollars per square foot. What is the total cost of the materials for the cuboid?