What would the depelation rate per ton of ore be, the journal entry recording the depletion for 2013 of sold 150,000 tons of ore, and the journal entry for depreciation on the building using units of production method using the amount of ore extracted of 150,000 tons?

Company purchased a site containing ore during 2013. Purchase price was $820,000 and the site contains 400,000 tons or ore. The building cost $500,000, when the ore is done, the building will have no future value.