a. ATC per unit for each level of output listed in the table:
Output | Cost | ATC
500 | $5,500 | 11.00
1,000 | $7,500 | 7.50
2,000 | $9,500 | 4.75
b. Yes, this is a decreasing-cost industry.
c. If the market price for a bottle of vitamins is $2.51 and the total market quantity demanded is 82,610,000 bottles, there will be 33 firms in this industry.
d. If the market quantity demanded at a price of $2.51 is only 75,100, then there will be 12 firms in this industry.
e. Yes, the level of demand does determine this industry's market structure. The higher the demand, the more firms that will enter the market, and the lower the demand, the fewer firms that will enter the market.
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