Mountain View Resorts purchased equipment at the beginning of 2021 for $33,000. Residual value at the end of an estimated four year service life is expected to be $8.800. The machine operated for 2,000 hours in the first year and the company expects the machine to operate for a total of 9,000 hours over its four-year life Calculate depreciation expense for 2021. 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