A broad-gauge railway track 3.38 km long with sleeper density (n+7) is going to be constructed. Calculate the cost involved in transporting the sleepers from the manufacturing plant to the construction site by the truck whose load carrying capacity is 80 tons and it charges 700Rs per journey. Consider the sleeper material as concrete and its shape as a cuboid with dimensions 1.6 m x 0.6 m x 0.4 m. Take \(\gamma_c\) = 2400 kg/m³