Below is a table with total data for a firm in a perfectly competitive industry.

QuantityTotal Cost

0 ............100

10 ...........220

15 ............300

20 ............360

25 ............450

30 ............600

35 ............770

40 ............960

a. What is the marginal cost and average total cost for the firm at each level of output?

b. If the prevailing market price is $34 per unit, how many units will be produced and sold? What are the profits per unit? What are total profits?

c. Is the industry in long run equilibrium at this price? If not, what do you expect to happen to price over time?