Final answer:
In Engineering Economic Analysis, sunk costs are disregarded because they are past expenses that cannot be recovered and do not affect future economic decisions. In Engineering Economic Analysis, the type of cost that is usually disregarded is the sunk cost (c).
Step-by-step explanation:
In Engineering Economic Analysis, the type of cost that is usually disregarded is the sunk cost. This is because sunk costs are expenditures that have already been made and cannot be recovered; hence, they are not relevant to future economic decisions. In contrast, variable costs and marginal costs provide valuable information regarding the cost of increasing production and the firm's ability to manage expenses. Fixed costs are often considered sunk costs because once incurred, they do not change with the level of production. Therefore, when making decisions about future production or pricing, sunk costs should not influence the decision-making process.
In Engineering Economic Analysis, sunk costs are usually disregarded. Sunk costs are costs that have already been incurred and cannot be recovered. Since they are in the past and cannot be altered, they should not be considered when making economic decisions about future production or pricing.