Iron Works, Inc. purchased a metal casting machine on January 1, 2014. The cost of the machine was $30.500 Its estimated residual value was $6,500 at the end of an es10ear ide. The company expects to produce a total of 10,000 units. a. Calculate depreciation expense for 2014 and 2015 using the straight-line method Depreciation Expense b. Calculate depreciation expense for 2014 and 2015 using the double-declining balance method 2014 2015 c. Calculate the depreciation expense for 2014 and 2015 using the units-of production method The company produced 1,150 unts in 2014 and 1,500 units in 2015 Round your final answer to nearest dollar value.) 2014 2015 Depreciation Expense