On January 1, 2019, XXX Company purchased a new truck for $51.400. Its estimated useful life is 10 years or 200,000 miles. The truck's expected salvage value is $1,400. During 2019, the truck was driven 15,000 miles. Assuming units-of-production depreciation, 2019 depreciation expense is: Select one: $5,000 . . .750 C. $5,140 d. $3,855 YYY Company purchased a tractor at a cost of $300,000. The tractor has an estimated salvage value of $40,000 and an estimated life of 10 years, or 20,000 hours of operation. The tractor was purchased on January 1, 2019 and was used 2,000 hours in 2019 and 2,500 hours in 2020. On January 1, 2021, the company decided to sell the tractor for $200,000. YYY uses the units-of-production method to account for the depreciation on the tractor. Based on this information, the entry to record the sale of the tractor will show Select one: a. A gain of $52,500 b. A gain of $41,500 c. A loss of $41,500 d. A loss of $52,500 XXX Company purchased a tractor at a cost of $500,000. The tractor has an estimated salvage value of $50,000 and an estimated life of 10 years, or 100,000 hours of operation. The tractor was purchased on January 1, 2019 and was used 25,000 hours in 2019 and 20,000 hours in 2020. What method of depreciation will produce the maximum depreciation expense in 2019? Select one: a. Double-declining-balance b. Units-of-production c. Straight-line d. All methods produce the same expense in 2019