Antioch Extraction, which mines ore in Montana, uses a calendar year for both financial-reporting and tax purposes. The following selected costs were incurred in December, the low point of activity, when 1,550 tons of ore were extracted: Straight-line depreciation Charitable contributions* Mining labor/fringe benefits Royalties Trucking and hauling *Incurred only in December. $ 36,500 10,500 294,500 142,250 295,410 Peak activity of 2,850 tons occurred in June, resulting in mining labor/fringe benefit costs of $541,500, royalties of $226,750, and trucking and hauling outlays of $385,410. The trucking and hauling outlays exhibit the following behavior: Less than 1,550 tons From 1,550-2,049 tons From 2,050-2,549 tons From 2,550-3,049 tons $250,410 295,410 340,410 385,410 Antioch uses the high-low method to analyze costs. Required: 1. Classify the five costs listed in terms of their behavior: variable, step-variable, committed fixed, discretionary fixed, step-fixed, or semivariable. 2. Calculate the total cost for next February when 1,850 tons are expected to be extracted. 3-a. Is hauling 1,550 tons with respect to Antioch's trucking/hauling cost behavior cost-effective? 3-b. If the company plans to extract 1,550 tons, at what number of tons can cost-effectiveness be achieved? 4. Distinguish between committed and discretionary fixed costs. If Antioch were to experience severe economic difficulties, which of the two types of fixed costs should management try to cut? 5. Speculate as to why the company's charitable contribution cost arises only in December.