Depreciation for Partial Periods Norman Delivery Company purchased a new delivery truck for $51,000 on April 1, 2019. The truck is expected to have a service life of 5 years or 150,000 miles and a residual value of $3,000. The truck was driven 8,000 miles in 2019 and 16,000 miles in 2020. Norman computes depreciation expense to the nearest whole month. Required: Compute depreciation expense for 2019 and 2020 using the following methods: (Round your answers to the nearest dollar.) Straight-line method 2019 $ fill in the blank 1 7,200 2020 $ fill in the blank 2 9,600 Sum-of-the-years'-digits method 2019 $ fill in the blank 3 40,000 2020 $ fill in the blank 4 Double-declining-balance method 2019 $ fill in the