Super Saver Groceries purchased store equipment for $28,000. Super Saver estimates that at the end of its 10-year service life, the equipment will be worth $3,000. During the 10-year period, the company expects to use the equipment for a total of 10,000 hours. Super Saver used the equipment for 1,680 hours the first year Required: Calculate depreciation expense of the equipment for the first year, using each of the following methods. (Do not round your intermediate calculations.) 1. Straight-ine. 2. Double-declining-balance. 3. Activity-based