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: (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