Answer:
Positive economic profit
Explanation: In the economic profit, we have to consider the revenue earned and the cost of production including the opportunity cost. In the scenario above, the economic profit is positive, because, the average and marginal cost falls by $0.15 at a time when the sales price of the product is $0.20. The economic profit here is positive, due to the further reduction in the marginal and average price of an important material in the production process. In this scenario, due to positive economic profit, the New firms are attracted to the market.