Check my work Plummer Industries purchased a machine for $42,600 and is depreciating it with the straight-line method over a life of 8 years, using a residual value of $2,600. At the beginning of the sixth year, an extraordinary repair was made costing $3,200, the estimated useful life was extended to 13 years, and no change was made to the estimated residual value. Calculate depreciation expense for year 6 (Do not round intermediate calculations.) Depreciation Expense