Mountain Eleven Company purchased equipment for $700,000 on January 1, 2017. It is estimated that the equipment will have a useful life of 15 years and a salvage value of $10,000. Mountain Elevens fiscal year end is December 31.

(a) During 2017, Mountain Eleven uses the equipment for 1,800 hours. Estimated total working hours are 30,000. Compute depreciation expense using the activity method for 2017.

(b) Compute depreciation expense using the sum-of-the-years digits method for 2017 and 2018.

(c) Compute depreciation expense using the double-declining balance method for 2017 and 2018. (Round percentages to two decimal places. For example, round 0.345678 to 34.57%)