Jackal Energy purchased a transport truck on January 1,2020 , for $268,600 cash. Its estimated useful life is five years or 270,000 kilometres with an estimated residual value of $49,900. Required: Calculate depreciation expense for the year ended December 31, 2020, using each of the following methods: (Do not round intermediate calculations.) a. Straight-line b. Double-declining-balance c. Units-of-production (assume 36,000 kilometres were actually driven in 2020). Analysis component: Which depreciation method will produce the highest profit for Jackal in 2020