2- Sun Company purchased a mine for $70,000 that is estimated to have 3,500 tons of coal and no salvage value. In the first year, 500 tons of coal are extracted. prepare the journal entry to record depletion for the first year. 3- Dell Company purchases a patent for $14,000 on January 1, 2017. The estimated useful life is 8 years. Prepare the journal entry to record amortization expense for the second year