Wexford Co$.$ purchased a new delivery truck at the beginning of $2017.$ The truck has a cost of $$37,000,$ an estimated life of five years, and an estimated residual value of $$7,000.$ A full year's depreciation expense is to be recorded in $2017.$ The truck was driven $20,000$ miles during $2017$ and $24,000$ miles during $2018.$ The number of expected miles over five years is $100,000.$ Wexford Co$.$ wants to use the depreciation method that will result in the highest depreciation expense for $2017.$ Which method should be used?