If the variable costs for a firm are $57, the fixed costs are $143, and the firm sells 40 units, what are the firm's average total costs

The green revolution is a scientific breakthrough that improved seeds for basic crops. how did the green revolution impact the supply of basic crops such as wheat and corn? the supply of wheat and corn increased. there was no impact on the supply of basic crops. the supply of basic crops did not change, but the quantity supplied of basic crops increased. the supply of wheat and corn decreased.