| LOS c: Distinguish between the cost and the price of a product and explain the supply curve and producer surplus. In a competitive market, the gains to society are maximized under which of the conditions described below by marginal benefit, marginal cost, producer surplus, and consumer surplus, respectively? 
 
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| A) | $2.50; $2.50; $35; $35. |  |  
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| B) | $1.00; $1.00; $15; $15. |  |  
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| C) | $1.50; $1.50; $45; $30. |  |  
 
 
 
In a competitive market, the efficient equilibrium quantity produced is the quantity where marginal benefit equals marginal cost and the sum of consumer and producer surplus is maximized.   |