1 The presence of a substance and the amount of that substance. 2  Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). 3  The biological or pharmacological potency of a drug. Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). 2  The biological or pharmacological potency of a drug. 3  For example, an assay may be done of a vaccine to determine its potency.
The total cost curve graphically represents the relation between total cost and the quantity of production. This curve can be derived in two ways. One is to plot a schedule of numbers relating output quantity and total cost. The other is to vertically add the total variable cost curve and the total fixed cost curve.he total cost curve is frequently used with a total revenue curve to determine the profit maximizing level of production for a firm. However, this curve is perhaps most important as the basis for deriving the average total cost curve and the marginal cost curve.
Updated April 01, 2016. Average total cost is the sum of all the production costs divided by the number of units produced. See here for more detail related to average total cost and here for how it is graphed. Terms related to Average Total Cost: The Cost Curve. Average Propensity to Consume. Structural Moving Average.