An equipment has been purchased at an initial cost of ₹160000 and has an estimated salvage value of ₹10000. The equipment has an estimated life of 5 years. The difference between the book values (in ₹, in integer) obtained at the end of the 4\(^\text{th}\) year using straight line method and sum of years digit method of depreciation is \(\underline{\hspace{1cm}}\).