Minnesota Mining Company buys special drills for $690,000 each. Each drill can extract about 200,000 tons of ore, after which it has a $30,000 residual value. Minnesota bought one such drill in early January 20X1. Projected tonnage figures for the drill are 30,000 tons in 20X1, 80,000 tons in 20X2, and 90,000 tons in 20X3. The drill is scheduled for sale at the end of the third year at the $30,000 residual value. Minnesota is considering units-of-production depreciation, straight-line, or DDB depreciation for the drill. Requirement 1. Compute depreciation for each year under each of the three methods. Requirement 1. Compute depreciation for each year under each of the three methods. Before computing the annual depreciation amounts, start by selecting the formula and solving for the depreciation expense per unit amount, and then select the annual depreciation formula for each of the three methods. Start by selecting the formula and entering the amounts to solve for the depreciation expense per unit. (Round to the nearest cent.) Depreciation per unit Next, select the formula you will need to compute annual depreciation under each of the three methods. =Annual units-of-production depreciation Annual straight-line depreciation Annual DDB depreciation Now, compute depreciation for each year under the units-of-production method, the straight-line method, and then the DDB method. (Do not round interim calculations. Round your final answer to the nearest whole dollar.) Annual Straight-Line Annual DDB Annual Units-of-Production Depreciation Depreciation Depreciation 20X1 20X2 20X3 Total