What are the seven various cost descriptors?

The seven various cost descriptors are fixed costs, variable costs, semi-variable costs, direct costs, indirect costs, marginal costs, and opportunity costs. Fixed costs remain constant regardless of production levels, while variable costs fluctuate with output. Semi-variable costs contain both fixed and variable components. Direct costs can be traced directly to a product, whereas indirect costs are not easily traceable; marginal costs refer to the cost of producing one additional unit, and opportunity costs represent the potential benefits lost when choosing one alternative over another.