need clarification

on October of exp years, or 800,000 miles. The bus is estimated to have SO residual value. The first year, the bus is driven for 400,000 miles and the second year, the bus is driven for 450.000 miles. Using the Points) Company purchased school bus for $200,000. The bus has a full life of units of production (output) method, calculate the depreciation expense rate AND calculate the depreciation expense the company should recognize in Yen 1 and Year 2: Rate: Cot. salvage value) I tolal OLGUD units of productona 800000 20.5 Year 1: 2.00 350 - 400 000 ) = Year 2: 200 000 - ) 450 000 D00 00-00 1700000 6: (4 Points) At the end of Year 3, what would be the asset's Net Book Value? Net boot value would be