Sandhill Interiors purchased a delivery truck for R$33,000 on January 1, 2020. The truck has an expected residual value of R$1,680, and is expected to be driven 108,000 miles over its estimated useful life of 10 years. Actual miles driven were 16,000 in 2020 and 11,300 in 2021. Calculate depreciable cost per unit. (Round answers to 2 decimal places, e.s. 0.50.) Depreciable cost per unit R\$ per mile eTextbook and Media List of Accounts Compute depreciation expense for 2020 and 2021 using the straight-line method, the units-of-activity method, and the double-declining-balance method. (Credit account titles are automatically indented when amount is entered. Do not indent manually.)