Colorado Mining paid $600,000 to acquire a mine with 40,000 tons of coal reserves. The financial statements model shown on the last tab reflects Colorado Mining's financial condition just prior to purchasing the coal reserves. The company extracted 15,000 tons of coal in year 1 and 18,000 tons in year 2. Required a. Compute the depletion charge per unit. b-1. Compute the depletion expense for years 1 and 2 in a financial statements. b-2. Record the acquisition of the coal reserves and the depletion expense for years 1 and 2 in a financial statements model.