A shipping container, measuring 3 feet LaTeX: \left[ft\right][ f t ] by 2 feet LaTeX: \left[ft\right][ f t ] by 4.5 feet LaTeX: \left[ft\right][ f t ], weighs 15 pounds-force LaTeX: \left[lb_f\right][ l b f ] when empty. The container is filled completely with a fluid that has a specific gravity of 0.85. The container is then pushed across the lab a distance of 20 feet LaTeX: \left[ft\right][ f t ]. Determine the work done to push the container in units of kilojoules LaTeX: \left[kJ\right][ k J ].