Sunk costs: are the losses which have already been incurred and which are unrecoverable. are the losses associated with failed business ventures. are the same as fixed costs. are an important component of marginal analysis. are the sum of fixed and variable costs.

are the losses which have already been incurred and which are unrecoverable. 

Explanation:

Sunk costs are costs that have already been incurred and are not unrecoverable. They are not considered in future decision making.

Total cost is the sum of fixed and variable cost.

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