Match the following:

List-I (Cost)	List-II (Formula)
a. Average fixed cost	1. $$\frac{{{\text{Total Fixed Cost}}}}{{{\text{Quantity}}}}$$
b. Average variable cost	2. $$\frac{{{\text{Total Variable Cost}}}}{{{\text{Quantity}}}}$$
c. Average total cost	3. $$\frac{{{\text{Total Cost}}}}{{{\text{Quantity}}}}$$
d. Marginal cost	4. $${\text{Total production}} + {\text{One addition production}}$$