due on 8/26/2017 at 3pm pacific time no plagerism plz

Write a two-page essay that explains why in perfect competition, there are no economic profits or losses in the long run. Use the attached journal as your reference source along with one other reliable source. Your essay must be formatted in APA style.
 
All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations. All references and citations used must be in APA style.