Mountain View Resorts purchased equipment at the beginning of 2021 for $48,000 Residual value at the end of an estimated four- year service life is expected to be $7,900. The machine operated for 1.200 hours in the first year and the company expects the machine to operate for a total of 11.000 hours over its four-year life Calculate depreciation expense for 2021. using each of the following depreciation methods: () 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