E9-7B: Tanger Company purchased a delivery truck for $36,000 on January 1, 2014. The truck has an expected salvage value of $6,000, and is expected to be driven 100,000 miles over its estimated useful life of 8 years. Actual miles driven were 15,000 in 2014 and 12,000 in 2015. Instructions: Compute depreciation expense for 2014 and 2015 using (1) the straight-line method, (2) the units-of-activity method, and (3) the double-declining-balance method.