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

1,500 tons of ore were extracted:

Straight-line depreciation ........................... $ 25,000 Royalties ...................................... $135,000

Charitable contributions* ............................ 11,000 Trucking and hauling ................... 275,000

Mining labor/fringe benefits ........................ 345,000

*Incurred only in December.

Peak activity of 2,600 tons occurred in June, resulting in mining labor/fringe benefit costs of $598,000,

royalties of $201,000, and trucking and hauling outlays of $325,000. The trucking and hauling outlays

exhibit the following behavior:

Less than 1,500 tons ........................................................................................................................................... $250,000

From 1,5001,899 tons ........................................................................................................................................ 275,000

From 1,9002,299 tons ........................................................................................................................................ 300,000

From 2,3002,699 tons ........................................................................................................................................ 325,000

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. Show calculations to support your answers for

mining labor/fringe benefits and royalties.

2. Calculate the total cost for next February when 1,650 tons are expected to be extracted.

3. Comment on the cost-effectiveness of hauling 1,500 tons with respect to Antiochs trucking/hauling

cost behavior. Can the companys effectiveness be improved? How?

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? Why?

5. Speculate as to why the companys charitable contribution cost arises only in December

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