The document discusses whether it is acceptable to sell products or services below total cost. It explains that selling below variable costs is generally not advisable as it will lead to losses. However, if the sale covers variable costs and contributes to fixed costs, then it can be considered. As an example, the document outlines a catering company that has fixed costs of $400 per day. Taking a small lunch order that pays less than total costs but covers the variable costs and contributes to the fixed costs of $400 is acceptable in the short run.