2014 Mountain View Resorts purchased equipment at the beginning of 2021 for $42,000. Residual value at the end of an estimated four- year service life is expected to be $6,900. The machine operated for 1100 hours in the first year and the company expects the machine to operate for a total of 12,000 hours over its four-year life. Calculate depreciation expense for 2021, using each of the following depreciation methods (1) straightline (2) double-declining balance, and (3) activity based (Round your intermediate calculations to 2 decimal places.) 52.45 Depreciation Expense Straight-line Double-declining balance Activity-based