Mountainview Resorts purchased equipment for $42,000. Residual value at the end of an estimated four-year service life is expected to be $8,400. The machine operated for 1,100 hours in the first year and the company expects the machine to operate for a total of 10,000 hours over its four year life. Calculate depreciation expense for the first year using each of the following depreciation methods: (1) straight-line, (2) double-declining-balance, and (3) activity- based. (Round your intermediate calculations to 2 decimal places.) Depreciation Expense Straight-line Double-declining-balance Activity-based