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In the production of beer, a final filtration is accomplished by the use of "Kieselguhr" or diatomaceous earth, which is composed of the fossil remains of minute aquatic algae, a few microns in diameter and composed of pure silica. A company has purchased a property for $840,000 that contains an estimated 60,000 tons. Compute the depreciation charges for the first three years, if a production (or extraction) of 3,000 tons, 5,000 tons, and 6,000 tons are planned for years 1, 2, and 3, respectively. Using the production units method , assuming no salvage value for the property, calculate depreciation.(5)