| Term 
 | Definition 
 
        | Those products for which the sales of one may contribute to the sales of another. |  | 
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        | Term 
 
        | Incremental ( or differential) cost |  | Definition 
 
        | The increases or decreases in total costs incurred by selecting one course of action over another. |  | 
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        | Term 
 
        | Incremental (or differential) revenue |  | Definition 
 
        | the increase or decrease in total revenue earned by selecting one course of action over another. |  | 
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        | Term 
 | Definition 
 
        | costs incurred in manufacturing process that produce several different products. Joint costs cannot be traced directly to the individual types of products manufactured and, therefore, must be allocated in a more or less arbitrary way. |  | 
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        | Term 
 | Definition 
 
        | products that share, in part, common materials and production processes. |  | 
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        | Term 
 | Definition 
 
        | the benefit foregone by not pursuing an alternative course of action. Opportunity costs are not recored in the accounting records but are important in making many types of business decisions. |  | 
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        | Term 
 | Definition 
 
        | Costs that have not yet been incurred and that may vary among alternative courses of action |  | 
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        | Term 
 | Definition 
 
        | the point at which separate and distinct joint products emerge from common materials and a shared production process |  | 
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        | Term 
 | Definition 
 
        | a cost that has been incurred as a result of past actions. Sunk costs are irrelevant to decisions involving future actions. |  | 
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