A firm is selling its product in a perfectly competitive market, and the price for its product is $10. Fill in the following table for the columns of price, total revenue, profit, marginal revenue, and marginal cost. If this firm is maximizing profit, how many units of output should it produce? . How Do I calculate this ?

Quantity Sold Price Total Revenue Total Cost Profit Marginal Revenue Marginal Cost

0 5

1 7

2 10

3 14

4 19

5 25

6 32

7 40

8 49

9 59

10 70

How would I use a graph to show the circumstances that would prevail in a competitive market where firms are earning economic profits. Can this scenario be maintained in the long run?