Then, by locating the first derivative's zeros, determine the average cost function's critical points. The cost of producing the next item is called the Marginal Cost (MC) at q items. The real ...

Others MC(q) = TC′(q). Taking the change in total costs and dividing by the change in quantity can be used to find marginal cost. In other words, as the quantity produced grows from 40 to 60 haircuts, ...