On january 1, 2018, the excel delivery company purchased a delivery van for $63,000. at the end of its five-year service life, it is estimated that the van will be worth $6,000. during the five-year period, the company expects to drive the van 190,000 miles. required: calculate annual depreciation for the five-year life of the van using each of the following methods. 1. straight line. 2. sum-of-the-years’-digits. 3. double-declining balance. 4. units of production using miles driven as a measure of output, and the following actual mileage: