Topics: Variable cost, Costs, Fixed cost Pages: 29 (8071 words) Published: October 13, 2014
A cost object is anything for which a separate measurement of costs is desired. Examples include a product, a service, a project, a customer, a brand category, an activity, and a department.
Direct costs of a cost object are related to the particular cost object and can be traced to that cost object in an economically feasible (cost-effective) way. Indirect costs of a cost object are related to the particular cost object but cannot be traced to that cost object in an economically feasible (cost-effective) way. Cost assignment is a general term that encompasses the assignment of both direct costs and indirect costs to a cost object. Direct costs are traced to a cost object while indirect costs are allocated to a cost object.

Managers believe that direct costs that are traced to a particular cost object are more 2-3
accurately assigned to that cost object than are indirect allocated costs. When costs are allocated, managers are less certain whether the cost allocation base accurately measures the resources demanded by a cost object. Managers prefer to use more accurate costs in their decisions. 2-4

Factors affecting the classification of a cost as direct or indirect include • the materiality of the cost in question,
• available information-gathering technology,
• design of operations

A variable cost changes in total in proportion to changes in the related level of total activity or volume. An example is a sales commission that is a percentage of each sales revenue dollar.
A fixed cost remains unchanged in total for a given time period, despite wide changes in the related level of total activity or volume. An example is the leasing cost of a machine that is unchanged for a given time period (such as a year) regardless of the number of units of product produced on the machine.

A cost driver is a variable, such as the level of activity or volume, that causally affects total costs over a given time span. A change in the cost driver results in a change in the level of total costs. For example, the number of vehicles assembled is a driver of the costs of steering wheels on a motor-vehicle assembly line.

The relevant range is the band of normal activity level or volume in which there is a specific relationship between the level of activity or volume and the cost in question. Costs are described as variable or fixed with respect to a particular relevant range. 2-8

A unit cost is computed by dividing some amount of total costs (the numerator) by the related number of units (the denominator). In many cases, the numerator will include a fixed cost that will not change despite changes in the denominator. It is erroneous in those cases to multiply the unit cost by activity or volume change to predict changes in total costs at different activity or volume levels.


Manufacturing-sector companies purchase materials and Ashtonnents and convert them into various finished goods, for example automotive and textile companies. Merchandising-sector companies purchase and then sell tangible products without changing their basic form, for example retailing or distribution. Service-sector companies provide services or intangible products to their customers, for example, legal advice or audits.


Manufacturing companies have one or more of the following three types of inventory: 1. Direct materials inventory. Direct materials in stock and awaiting use in the manufacturing process.
2. Work-in-process inventory. Goods partially worked on but not yet completed. Also called work in progress.
3. Finished goods inventory. Goods completed but not yet sold.

2-11 Inventoriable costs are all costs of a product that are considered as assets in the balance sheet when they are incurred and that become cost of goods sold when the product is sold. These costs are included in work-in-process and finished goods inventory (they are “inventoried”) to...
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