In the short run,there are 500 identical firms in a competitive market.The firms do not use any resources that are available in limited quantities,and each of them has the following cost structure: 
The long-run supply curve for this market is
Definitions:
Statement of Stockholder's Equity
A financial document that shows changes in the equity section of a company's balance sheet, including retained earnings and issued shares.
Accounting Equation
The fundamental equation of double-entry bookkeeping: Assets = Liabilities + Owner's Equity.
Liabilities
Financial obligations or debts owed by a business to others, which can include loans, accounts payable, mortgages, and other monies owed.
Total Assets
The sum of all current and non-current assets owned by a company, as reflected in its balance sheet.
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