Cougar Corp purchased machinery on January 1st, 2014 for $600,000, which it depreciated under the straight-line method with an estimated useful life of ten years and a $90,000 salvage value. On January 1st, 2016, Cougar Corp decided to change their estimate of the salvage value of the machinery to $50,000.

What is the accumulated depreciation associated with this machinery as of December 31st, 2016?