The average fixed cost decreases as output increases, while the average variable cost initially falls and then rises due to diminishing marginal returns.
The average total cost is the sum of average fixed cost and average variable cost. It starts high, decreases, and then increases as output rises.
Marginal cost is the additional cost incurred by producing one more unit of output. It is important for decision makers to consider marginal cost when determining whether to produce more.
The marginal cost curve intersects the average total cost curve at the minimum point of the average total cost.
Average cost measures provide historical information, while marginal cost indicates the cost of producing one more unit of output.