?A company purchases a piece of equipment for $$100,000.$ ?The equipment has a useful life of $5$ ?years. The company uses straight$-$line depreciation and assumes zero residual or salvage value. At the end of year $4,$ ?the company sells the equipment for $$35,000.$ ?

Calculate the after$-$tax residual value of the equipment, assuming a tax rate of $25\%$