Companies in the coal mining business use a lot of property, plant, and equipment. Not only is there the significant investment they must make in the equipment used to extract and process the coal, but they must also purchase the rights to the coal reserves themselves.

Goodyear Tire & Rubber Company, Inc. is the largest tire manufacturer in North America.

Cloud Peak Energy Corporation claims to be the largest private-sector coal company in the world. The following information was taken from these companies December 31, 2012, annual reports. All dollar amounts are in millions.

	Cloud Peak Energy, Inc.	Goodyear Tire
Sales	$1,212	$12,968
Depreciation and depletion costs	48	272
Property, plant, and equipment
(net of accumulated depreciation)	1,319	3,529
Total assets	1,939	13,574
Depreciation method	Straight-line or units of production	Straight-line
Estimated life of assets:
Buildings	5 to 25 years	5 to 45 years
Machinery and equipment	3 to 20 years	3 to 30 years
A. Calculate depreciation costs as a percentage of sales for each company. (Round your answner to 2 decimal places. Cloud Peak Energy % Goodyear Tire % B. Calculate bulidings, property, plant and equipment as a percentage of total assets for each company . (Round your answer to 2 decimal places.) Cloud Peak Energy % Goodyear Tire % C. Which compnay appears to be using its assets for efficiently? D. Identify some of the problems a fiancial analyst encounters when trying to compare the used of long-term assets of Cloud Peak versus Goodyear. ( Select all that apply) -Methods of depreciation -Assessments of useful life of the asset -Method of valuation of inventory -Revenue recognition policies