Sunk Cost

1) The unrecovered balance of an investment. It’s a cost already paid that is not relevant to the decision concerning the future that is being made. CapitalThe resources, or money, available for investing i... already invested that for some reason cannot be retrieved.2) A past cost that has no relevance with respect to future receipts and disbursements of a facility undergoing an economic study. This concept implies that since a past outlay is the same regardless of the alternative selected, it should not influence the choice between alternatives.